JEE Questions for Physics Ray Optics Quiz 21 - MCQExams.com

The graph between the lateral magnification (m) produced by a lens and the distance of the image (v) is given by

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  • 2)
    Physics-Ray Optics-86543.png

  • Physics-Ray Optics-86544.png

  • Physics-Ray Optics-86545.png
The graph shows variation of with v change in u for a mirror. Points plotted above the point P on the curve are for values of v
Physics-Ray Optics-86547.png
  • Smaller then f
  • Smaller then 2f
  • Larger then 2f
  • Larger than f
The graph shows how the magnification m produced by a convex thin lens varies with image distance v. What was the focal length of the used lines
Physics-Ray Optics-86549.png
  • b/c
  • b/ca
  • bc/a
  • c/b
Which of the following show appropriate variation of refractive index μ with wavelength λ?

  • Physics-Ray Optics-86551.png
  • 2)
    Physics-Ray Optics-86552.png

  • Physics-Ray Optics-86553.png

  • Physics-Ray Optics-86554.png
A graph is plotted between angle of deviation (δ) and angle of incidence (i) for a prism. The nearly correct graph is

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  • 2)
    Physics-Ray Optics-86578.png

  • Physics-Ray Optics-86579.png

  • Physics-Ray Optics-86580.png
A student measures the focal length of a convex lens by putting an object pin at a distance `u\' from the lens and measuring the distance v of the image pin. The graph between ‘u’and ‘v’ plotted by the student should look like

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  • 2)
    Physics-Ray Optics-86582.png

  • Physics-Ray Optics-86583.png

  • Physics-Ray Optics-86584.png
For a small angled prism, angle of prism A, the angle of minimum deviation (δ) varies with the refractive index of the prism as shown in the graph
Physics-Ray Optics-86585.png
  • Point P corresponds to μ =1
  • Slope of the line PQ = A/2
  • Slope = A
  • None of the above statements is true

Physics-Ray Optics-86587.png
  • Total internal reflection can take place
  • Total internal reflection cannot take place
  • Any of (a) and (b)
  • Data is incomplete
A medium shows relation between i and r as shown. If speed of light in the medium is ncthen value of n is
Physics-Ray Optics-86589.png
  • 1.5
  • 2
  • 2–1
  • 3–1/2
For a concave mirror, if virtual image is formed, thegraph between m and u is of the form

  • Physics-Ray Optics-86591.png
  • 2)
    Physics-Ray Optics-86592.png

  • Physics-Ray Optics-86593.png

  • Physics-Ray Optics-86594.png
A ray of light travels from a medium of refractive index μ to air. Its angle of incidence in the medium is i, measured from the normal to the boundary, and its angle of deviation is δ. δ is plotted against i which of the following best represents the resulting curve

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  • 2)
    Physics-Ray Optics-86597.png

  • Physics-Ray Optics-86598.png

  • Physics-Ray Optics-86599.png
The distance v of the real image formed by a convex lens is measured for various object distance u. A graph is plotted between v and u, which one of the following graphs is correct

  • Physics-Ray Optics-86601.png
  • 2)
    Physics-Ray Optics-86602.png

  • Physics-Ray Optics-86603.png

  • Physics-Ray Optics-86604.png
For a convex lens the distance of the object is taken on X-axis and the distance of the image is taken on Y-axis, the nature of the graph so obtained is
  • Straight line
  • Circle
  • Parabola
  • Hyperbola
Graph of position of image vs position of point object from a convex lens is shown. Then, focal length of the lens is
Physics-Ray Optics-86606.png
  • 0.50 ± 0.05
  • 0.50 ± 0.10
  • 5.00 ± 0.05
  • 5.00 ± 0.10
A light ray traveling in glass medium is incident on glass-air interface at an angle of incidence θ. The reflected (R) and transmitted (T) intensities, both as function of θ,are plotted. The correct sketch is

  • Physics-Ray Optics-86608.png
  • 2)
    Physics-Ray Optics-86609.png

  • Physics-Ray Optics-86610.png

  • Physics-Ray Optics-86611.png
A student performed the experiment of determination of focal length of a concave mirror by u–v method using an optical bench of length 1.5 metre. The focal length of the mirror used is 24 cm. The maximum error in the location of the image can be 0.2 cm. The 5 sets of (u, v) values recorded by the student (in cm) are : (42, 56), (48, 48), (60, 40), (66, 33), (78, 39). The data set(s) that cannot come from experiment and is (are)incorrectly recorded, is (are)
  • (42,
  • (48, 48)
  • (66,
  • (78, 39)
A ray of light travelling in a transparent medium falls on a surface separating the medium from air at an angle of incidence of 45°. The ray undergoes total internal reflection. If n is the refractive index of the medium with respect to air, select the possible value (s) of n from the following
  • 1.3
  • 1.4
  • 1.5
  • 1.6
A diminished image of an object is to be obtained on a screen 1.0m from it. This can be achieved by appropriately placing
  • A concave mirror of suitable focal length
  • A convex mirror of suitable focal length
  • A convex lens of focal length less than 0.25 m
  • A concave lens of suitable focal length
A planet is observed by an astronomical refracting telescope having an objective of focal length 16 m andan eye-piece of focal length 2 cm
  • The distance between the objective and the eye-piece is 16.02 m
  • The angular magnification of the planet is –800
  • The image of the planet is inverted
  • The objective is larger than the eyepiece
  • All the above
A converging lens is used to form an image on a screen. When the upper half of the lens is covered by an opaque screen
  • Half the image will disappear
  • Complete image will be formed
  • Intensity of the image will increase
  • Intensity of the image will decrease
Which of the following form(s) a virtual and erect image for all positions of the object?
  • Convex lens
  • Concave lens
  • Convex mirror
  • Concave mirror
The object distance u, the image distance v and the magnification m in a lens follow certain linearrelations. These are

  • Physics-Ray Optics-86616.png
  • m versus u
  • u versus v
  • m versus v
A ray OP of monochromatic light is incident on the face AB of prism ABCD near vertex B at an incident angle of 60° (see figure). If the refractive index of the materialof the prism√3which of the following is (are) correct
Physics-Ray Optics-86618.png
  • The ray gets totally internally reflected at face CD
  • The ray comes out through face AD
  • The angle between the incident ray and the emergent ray is 90°
  • The angle between the incident ray and the emergent ray is 120°
Statement 1 The formula connecting u, v and f, for a spherical mirror is valid only for mirrors whose sizes are very small compared to their radii of curvature.
Statement 2 Laws of reflection are strictly valid for plane surfaces, but not for large spherical surfaces
  • Statement I is true, statement II is true ; statement II is a correct explanation for statement I
  • Statement I is true, statement II is true ; statement II is not a correct explanation for statement I
  • Statement I is true, statement II is false
  • Statement I is false, statement II is true

Physics-Ray Optics-86620.png

  • Physics-Ray Optics-86621.png
  • 2)
    Physics-Ray Optics-86622.png

  • Physics-Ray Optics-86623.png
  • The wavelength of the light in the metal-material (λm) is given by λm = λair|n|, whereλairwavelength of the light in air

Physics-Ray Optics-86625.png

  • Physics-Ray Optics-86626.png
  • 2)
    Physics-Ray Optics-86627.png

  • Physics-Ray Optics-86628.png

  • Physics-Ray Optics-86629.png

Physics-Ray Optics-86631.png
  • 2
  • 4
  • 6
  • 8
An optical component and an object S placed along its optic axis are given in Column I. The distance between the object and the component can be varied. The properties of images are given in Column II. Match all the properties of images from Column II with the appropriate components given in Column I.
Physics-Ray Optics-86633.png

  • Physics-Ray Optics-86634.png
  • 2)
    Physics-Ray Optics-86635.png

  • Physics-Ray Optics-86636.png

  • Physics-Ray Optics-86637.png
A simple telescope used to view distant objects has eyepiece and objective lenses of focal lengths fe and f0respectively. Then
Physics-Ray Optics-86638.png

  • Physics-Ray Optics-86639.png
  • 2)
    Physics-Ray Optics-86640.png

  • Physics-Ray Optics-86641.png

  • Physics-Ray Optics-86642.png
Two transparent media of refractive index μ1, and μ3 have a solid lens shaped transparent material of refractive index μ2between them as shown in figures in Column-II. A ray transversing these media is also shown in the figures. In Column-I different relationships between μ1, μ2and μ3 are given. Match them to the ray diagrams shown in Column-II.
Physics-Ray Optics-86643.png

  • Physics-Ray Optics-86644.png
  • 2)
    Physics-Ray Optics-86645.png

  • Physics-Ray Optics-86646.png

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Assertion A red object appears dark in the yellow light
Reason A red colour is scattered less.
  • If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • If assertion is true but reason is false.
  • If the assertion and reason both are false.
  • If assertion is false but reason is true.
Assertion Within a glass slab, a double convex air bubble is formed. This air bubble behaves like a converging lens.
Reason Refractive index of air is more than the refractive index of glass.
  • If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • If assertion is true but reason is false.
  • If the assertion and reason both are false.
  • If assertion is false but reason is true.
Focal length of a plane mirror is
  • Zero
  • Infinite
  • Very less
  • Indefinite
Assertion The stars twinkle while the planets do not.
Reason The stars are much bigger in size than the planets
  • If both assertion and reason are true and the reason is the correct explanation of the assertion
  • If both assertion and reason are true but reason is not the correct explanation of the assertion
  • If assertion is true but reason is false.
  • If the assertion and reason both are false
  • If assertion is false but reason is true
Assertion Owls can move freely during night.
Reason They have large number of rods on their retina
  • If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • If assertion is true but reason is false.
  • If the assertion and reason both are false.
  • If assertion is false but reason is true.
Assertion The air bubble shines in water.
Reason Air bubble in water shines due to refraction of light
  • If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • If assertion is true but reason is false.
  • If the assertion and reason both are false.
  • If assertion is false but reason is true.
Assertion In a movie, ordinarily 24 frames are projected per second from one end to the other of the complete film.
Reason The image formed on retina of eye is sustained upto 1/10 second after the removal of stimulus
  • If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • If assertion is true but reason is false.
  • If the assertion and reason both are false.
  • If assertion is false but reason is true.
Assertion Blue colour of sky appears due to scattering of blue colour.
Reason Blue colour has shortest wave length in visible spectrum.
  • If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • If assertion is true but reason is false.
  • If the assertion and reason both are false.
  • If assertion is false but reason is true.

Physics-Ray Optics-86650.png
  • If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • If assertion is true but reason is false.
  • If the assertion and reason both are false.
  • If assertion is false but reason is true.
Assertion The setting sun appears to be red.
Reason Scattering of light is directly proportional to the wavelength.
  • If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • If assertion is true but reason is false.
  • If the assertion and reason both are false.
  • If assertion is false but reason is true.

Physics-Ray Optics-86652.png
  • If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • If assertion is true but reason is false.
  • If the assertion and reason both are false.
  • If assertion is false but reason is true.
Assertion Different colours travel with different speed in vacuum.
Reason Wavelength of light depends on refractive index of medium.
  • If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • If assertion is true but reason is false.
  • If the assertion and reason both are false.
  • If assertion is false but reason is true.
Assertion The colour of the green flower seen through red glass appears to be dark.
Reason Red glass transmits only red light.
  • If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • If assertion is true but reason is false.
  • If the assertion and reason both are false.
  • If assertion is false but reason is true.

Physics-Ray Optics-86655.png
  • If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • If assertion is true but reason is false.
  • If the assertion and reason both are false.
  • If assertion is false but reason is true.
Assertion If a plane glass slab is placed on the letters of different colours all the letters appear to be raised up to the same height.
Reason Different colours have different wavelengths.
  • If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • If assertion is true but reason is false.
  • If the assertion and reason both are false.
  • If assertion is false but reason is true.
Assertion The fluorescent tube is considered better than an electric bulb.
Reason Efficiency of fluorescent tube is more than the efficiency of electric bulb.
  • If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • If assertion is true but reason is false.
  • If the assertion and reason both are false.
  • If assertion is false but reason is true.
Assertion The polar caps of earth are cold in comparison to equatorial plane.
Reason The radiation absorbed by polar caps is less than the radiation absorbed by equatorial plane.
  • If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • If assertion is true but reason is false.
  • If the assertion and reason both are false.
  • If assertion is false but reason is true.
Assertion A concave mirror and convex lens both have the same focal length in air. When they are submerged in water, they will have same focal length.
Reason The refractive index of water is smaller than the refractive index of air.
  • If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • If assertion is true but reason is false.
  • If the assertion and reason both are false.
  • If assertion is false but reason is true.
Assertion In optical fibre, the diameter of the core is kept small.
Reason This smaller diameter of the core ensures that the fibre should have incident angle more than the critical angle required for total internal reflection.
  • If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • If assertion is true but reason is false.
  • If the assertion and reason both are false.
  • If assertion is false but reason is true.
Assertion The mirrors used in search lights are parabolic and not concave spherical.
Reason In a concave spherical mirror the image formed is always virtual.
  • If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • If assertion is true but reason is false.
  • If the assertion and reason both are false.
  • If assertion is false but reason is true.
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