CBSE Questions for Class 10 Physics Light Reflection And Refraction Quiz 2 - MCQExams.com

Angle which the normal ray makes with the mirror is equal to:
  • $$\displaystyle { 30 }^{ \circ}$$
  • $$\displaystyle { 45 }^{ \circ }$$
  • $$\displaystyle { 90 }^{ \circ }$$
  • $$\displaystyle { 180 }^{ \circ }$$
The ray which bounces off the surface of the mirror when the incident ray strikes the mirror is known as ________.  The point at which incident ray meets the mirror is called the _________.
  • normal ray, point of reflection
  • reflected ray, point of refraction
  • reflected ray, point of incidence
  • diffracted ray, point of diffraction
When a ray of light passes through a rectangular glass slab, the emergent ray is
  • parallel to the incident ray produced
  • perpendicular to the incident ray produced
  • oblique to the incident ray produced
  • inclined to the incident ray produced
Fill in the blanks:
The area of concave mirror that is exposed to incident light is called ________.
  • aperture
  • centre of curvature
  • focus
  • focal length
Fill in the blanks:
An image that cannot be obtained on a screen is called _________.
  • real
  • virtual
  • plane
  • none
Concave lenses are also known as
  • Converging lenses
  • Diverging lenses
  • Plane lenses
  • Circular lenses
What is known as linear magnification of spherical mirrors?
  • Ratio of size of image to size of object
  • Ratio of shape of image to size of object
  • Ratio of size of image to shape of object
  • None
Different types of spherical mirrors are:
  • plane and curved
  • convex and concave
  • real mirrors
  • virtual mirrors
Which of the following is the main reason of Opacity of light waves.
  • Reflection
  • Absorption
  • Refraction
  • Diffusion
  • Transmission
$$\dfrac {\sin i}{\sin r} = ......$$
  • $$1$$
  • $$2$$
  • Constant
  • Variable
Reflected ray is the ray of light reflected from a surface.
  • True
  • False
Normal is an imaginary line perpendicular to the surface where the reflection occurs.
  • True
  • False
A ray of light travels from a denser to a rarer medium then, the ray :
  • doesn't bend at all
  • bends towards the normal
  • bends away from the normal
  • goes along the normal
The height of the image formed by an object of height $$10 cm$$ placed in front of a plane mirror is ________.
  • $$5 cm$$
  • $$10 cm$$
  • $$15 cm$$
  • $$20 cm$$
When a ray of light travels from air to glass slab and strikes the surface of separation at $$90^o$$, then it ....... .
  • Bends towards normal
  • Bends away from normal
  • Passes unbent
  • Passes in zigzag way
The focal length of a spherical mirror is:
  • Maximum for red light
  • Maximum for blue light
  • Maximum for white light
  • Same for all lights
In the case of refraction of light :
a) Frequency changes
b) Speed changes
c) Wavelength changes
  • a is correct
  • b and c are correct
  • a, b, c are correct
  • a and b are correct
A square wire of side $$3.0 cm$$ is placed $$25 cm$$ in front of a concave mirror of focal length $$10  cm$$, with its centre on the axis of the mirror and its plane normal to the axis. The area enclosed by the image of the wire is :
  • 7.5 cm$$^{2}$$
  • 6.0 cm$$^{2}$$
  • 4.0 cm$$^{2}$$
  • 3.0 cm$$^{2}$$
A needle of length $$5\ cm$$, placed $$45 cm$$ from a lens, forms an image on a screen placed $$90\ cm$$ on the other side of the lens. The type of lens and its focal length is:
  • Convex, $$30\ cm$$
  • Concave, $$30\ cm$$
  • Convex, $$60\ cm$$
  • Concave, $$60\ cm$$
The image of an object placed in front of a concave mirror of focal length 12 cm is formed at a point which is 10 cm more distant from the mirror than the object. The magnification of the image is:
  • $$1.5$$
  • $$2$$
  • $$2.5$$
  • $$3$$
A convex lens of focal length $$15\ cm$$ produces a virtual image at a distance of $$30\ cm$$ from the lens. The object distance is:
  • $$5\ cm$$
  • $$7.5\ cm$$
  • $$-10\ cm$$
  • $$10\ cm$$
An object is situated at a distance of 15cm from a convex lens of focal length 30 cm. The position of the image formed by it will be 
  • - 30 cm
  • 30 cm
  • -10 cm
  •  10 cm
Beams of light are incident through the holes A and B and emerge out of box through the holes C and D respectively as shown in the figure. Which of the following could be inside the box?

80033.jpg
  • A rectangular glass slab
  • A convex lens
  • A concave lens
  • A prism
A plane mirror reflects a beam of light to form a real image. The incident beam is :
  • parallel
  • convergent
  • divergent
  • any one of the above
If a spherical mirror is immersed in a liquid, its focal length will:
  • Increase
  • Decrease
  • Remain unchanged
  • Depend on the nature of liquid
An object is placed at a distance $$2 f$$ from the pole of a convex mirror of focal length $$f$$ . The linear magnification is:
  • $$\dfrac{1}{3}$$
  • $$\dfrac{2}{3}$$
  • $$\dfrac{3}{4}$$
  • $$1$$

The angle of reflection is given by the angle :


73562_5bfb19883bfd40dba91f7f02245ee4d0.png
  • NOQ
  • QOB
  • PON
  • AOP

The line PO is called the _______.


73564_110cfc645aeb4941b26ca28c8d4a120d.PNG
  • Reflected ray
  • Incident ray
  • Normal
  • Refracted ray
The line OQ is called the :

73561_aae4b7ffa47b401f9ec4fd3839880758.png
  • reflected ray
  • incident ray
  • normal
  • refracted ray
A light ray is traveling from air to glass. The angle of incidence on the boundary is 30$$^{\circ}$$. Find the sine of the angle of refraction. (Take: $$sin\ 30^o = \dfrac{1}{2}$$)
  • 1/3
  • 2
  • 3
  • 1
  • Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
  • Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
  • Assertion is correct but Reason is incorrect
  • Both Assertion and Reason are incorrect
A converging beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens on the opposite side. If the lens is removed the point where the rays meet will move 5 cm closer to the lens. The focal length of the lens is :
  • 5 cm
  • -10 cm
  • 20 cm
  • -30 cm
An object $$5$$ cm tall is placed $$1$$ m from a concave spherical mirror which has a radius of curvature of $$20$$ cm. The size of the image is:
  • $$0.11 cm$$
  • $$0.50 cm$$
  • $$0.55 cm$$
  • $$0.60 cm$$
It is desired to photograph the image of an object placed at a distance of $$3$$ m from a plane mirror. The camera, which is at a distance of $$4.5$$ m from the mirror should be focused for a distance of :
  • $$3 m$$
  • $$4.5 m$$
  • $$6 m$$
  • $$7.5 m$$
Statement- I : 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- II : 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
The line NO that is perpendicular to the plane mirror surface and drawn at the point of incidence is called the :

73560_92e07576df39484abdef75e2954ca0b8.png
  • reflected ray
  • incident ray
  • normal
  • refracted ray

The point C is the :


73578_532438f2bd6d4bd88e8bf0d37387cc4a.png
  • Center of curvature
  • Principal focus
  • Pole
  • None

Which of the following defines the center of curvature of a curved mirror?
  • The center of the hollow glass sphere of which the curved mirror was (previously) a part
  • The geometric center of the curved mirror
  • The radius of the hollow glass sphere of which the curved mirror was (previously) a part
  • None of these

The mirror shown is _______ in shape.


73575_676600d106e341fd9220395dc2bfac4e.png
  • Convex
  • Concave
  • Concavo-convex
  • Convexo-concave
The given figure shows a ray of light as it travels from medium A to medium B. Refractive index of the medium B relative to medium A is:

80024.jpg
  • $$\dfrac{\sqrt{3}} {\sqrt{2}}$$
  • $$\dfrac{\sqrt{2}} {\sqrt{3}}$$
  • $$\dfrac{1} {\sqrt{2}}$$
  • $$\sqrt{2}$$

The imaginary line passing through the pole and the center of curvature of the curved mirror is called its _______.
  • Focal length
  • Radius of curvature
  • Principal axis
  • None

The point F is the :


73577_0497edee059840fca81b7c7bb57e3596.png
  • Principal axis
  • Principal focus
  • Pole
  • None
A convex mirror has a focal length f. A real object is placed at a distance f/2 in front of it from the pole. The mirror produces an image at
  • $$3f$$
  • $$f$$
  • $$2f$$
  • $$f/3$$
A beam of light is incident through the holes on side A and emerges out of the holes on the other face of the box as shown in the fogure. Which of the following could be inside the box ?

80041_d807b695d1994302a984474044b424bd.png
  • Concave lens
  • Rectangular glass slab
  • Prism
  • Convex lens
Which is the path of rays of light when it enters with oblique incidence from water into air ?
The path of a ray of light passing through a rectangular glass slab tested by four students are shown in the figure as $$ A, B, C,$$ and $$D $$. Which one of them is correct?
80375_81700e69d4e64664bf3faae8165664fd.png
  • $$A$$
  • $$B$$
  • $$C$$
  • $$D$$
A student focussed the image of a candle flame on a white screen using a convex lens. He noted down the position of the candle screen and the lens as under :

Position of candle $$= 12.0\ cm$$
Position of convex lens $$= 50.0\ cm$$
Position of the screen $$= 88.0\ cm$$

What will be the nature of the image formed if he further shifts the candle towards the lens?
  • Virtual and erect
  • Real and inverted
  • Real and diminished
  • None of the above
A small hole P is made in a piece of cardboard. The hole is illuminated by a torch as shown in Fig. 16.The pencil of light coming out of the hole falls on a mirror.
At which point should the eye be placed so that the hole can be seen?

82302_b43ccf4afe4d42abba307f387eef82f8.png
  • A
  • B
  • C
  • D
The magnification produced by a concave mirror :
  • is always more than one
  • is always less than one
  • is always equal to one
  • may be less than, equal to or greater than one
In case of a real and inverted image, the magnification of a mirror is:
  • Positive
  • Negative
  • Zero
  • Infinity
0:0:1


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