CBSE Questions for Class 10 Physics Human Eye And Colorful World Quiz 2 - MCQExams.com

In the figure of the human eye, the cornea is represented by the letter :

82317_2f79c074e919484685e6350a0b9f3dd3.png
  • A
  • B
  • C
  • D
Eye lens contains a watery liquid called:
  • Aqueous humour
  • Peroxide
  • Vitreous humour
  • None of these
The eye consists of a screen called ______ on which the light rays are focused.
  • Retina
  • Iris
  • Pupil
  • None of these
Long-sightedness : Hypermetropia 
Short-sightedness : 
  • Myopia
  • Focussing
  • Astigmatism
  • Accommodation
Cornea is a transparent spherical structure which :
  • Reflects light
  • Scatters light
  • Refracts light
  • None of these
Red light is used as danger signal because it is:
  • Accepted as symbol
  • Pleasing to the eye
  • Sensitive to the eye
  • Has high wavelength
Our eye lens is held in position by :
  • Rods and cones
  • Iris and pupil
  • Ciliary muscles
  • None of these
Blue colour of  sky is due to:
  • scattering.
  • absorption.
  • reflection.
  • refraction.
A parallel beam of light falling on the eye gets focused on the retina because of refractions at :
  • the cornea
  • the crystalline lens
  • the vitreous humor
  • various surfaces in the eye
Image on the retina remains for:
  • 20 s
  • 10 s
  • $$\dfrac {1}{100}s$$
  • $$\dfrac {1}{16}s$$
Change in focal length of an eye-lens to focus the image of the object at varying distances is done by the action of:
  • Pupil
  • Ciliary muscles
  • Retina
  • Blind spot
A series of fast-moving still pictures can create an illusion of movement because:
  • The eye can focus on very rapidly changing pictures
  • The eye is quicker than the brain
  • The eye can separate two images only when the interval of separation between them is one-sixteenth of a second
  • The optical cortex can see through the rapidly moving images
The angle between the two refracting surface of a prism is called angle of:
  • Incidence
  • Base
  • Dispersion
  • Prism
The phenomenon due to which white light splits into seven colours on passing through a prism is called _________
  • reflection
  • refraction
  • dispersion
  • all the above
Name the colour of white light which is deviated the least, on passing through a prism.
  • Red
  • Violet
  • Blue
  • Orange
Fill in the blank spaces by choosing the correct words from the list given below:
List : yellow spot, principal focus, less, shutter, more.
The small but very light sensitive area on the retina is called __________.
  • yellow spot
  • principal focus
  • shutter
  • none of the above
State whether true or false:
A concave lens is used to correct short-sightedness in eye.
  • True
  • False
A person having the nearest distance of distinct vision of $$32 \ cm$$. Uses a reading lens of $$8 \ cm$$ focal length. The magnification of his reading lens is -
  • $$5$$
  • $$4$$
  • $$3$$
  • $$2$$
A prism is a piece of transparent material having _____ triangular and _____ rectangular surfaces.
  • three, two
  • two, three
  • three, three
  • two, two
The part which protects the human eye is called :
  • Cornea
  • Choroid
  • Retina
  • Blind spot
Cilliary muscles in the eye:
  • Holds the eye lens in place
  • Increases or decreases the focal length of the eye lens.
  • Both A and B
  • None of these
When white light enters a prism, its gets splits into its constituent colours. This is because of:
  • high density of prism material
  • refractive index which is different for different wavelengths
  • diffraction of light
  • interference of light
In the white light of sun, maximum scattering by the air molecules present in the earth's atmosphere is for:
  • red colour
  • yellow colour
  • green colour
  • blue colour
Which of the following statements about human eye is NOT true?
  • the iris gives a distinct colour to the eye
  • the yellow spot is extremely sensitive to light
  • the space between lens and cornea is filled with ciliary muscles
  • the optic nerves enters the eye near the blind spot
Quantity of light entering the eyes is controlled by
  • Retina
  • Ciliary muscles
  • Pupil
  • Eye-lens
When a white light ray falls on a prism, the ray at its first surface suffers:
  • no refraction
  • only dispersion
  • only deviation
  • both deviation and dispersion
A long-sighted eye can see:
  • near objects clearly
  • far-off objects clearly
  • both near and far-off objects clearly
  • none of these
State whether true or false:-
The cornea gives the colour of the eye.
  • True
  • False
Identify the part 'A' from the shown figure of human eye :
283833_bd49b2d80dea47aab7ee870a91e4ff7d.png
  • Retina
  • Cornea
  • Pupil
  • Iris
The band of colours obtained on a screen on passing white light through a prism is called :
  • a spectrum
  • a dispersion band
  • scattering
  • none of these
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