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CBSE
Class 10 Science
Human Eye And Colourful World
Quiz 2
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Type of lens used in correction of myopia
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convex lens
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concave lens
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reflecting lens
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bifocal lens
Explanation
concave lens
Type of lens used in correction of hypermetropia
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concave lens
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reflecting lens
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bifocal lens
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convex lens
Explanation
convex lens
Myopia may arise due to
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excessive curvature of the eye lens
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elongation of the eyeball
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both (a) and (b)
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none of these
Explanation
both (a) and (b)
In an experiment to trace the path of a ray of light through a glass prism for different values of angle of incidence a student would find that the emergent ray:
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is parallel to the incident ray
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is perpendicular to the incident ray
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is parallel to the refracted ray
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bends at an angle to the direction of incident ray
Explanation
bends at an angle to the direction of incident ray
While performing the experiment to trace the path of a ray of light passing through a glass prism, four students marked the incident ray and the emergent ray in their diagrams in the manner shown below.
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I
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II
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III
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IV
Explanation
III
A dark muscular membrane which controls size of pupil
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eye
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iris
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cornea
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retina
Explanation
iris
Least distance of distinct vision for normal eye is
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25 cm
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50 cm
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75 cm
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infinity
Explanation
25 cm
Farthest point of a normal eye is
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25 cm
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50 cm
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75 cm
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infinity
Explanation
infinity
Crystalline lens of people at old age becomes milky and cloudy. This condition is called
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myopia
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lever
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cataract
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presbyopia
Explanation
cataract
The splitting of light into its component colours is called
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Spectrum
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Dispersion
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Tyndall effect
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Refraction
Explanation
Dispersion
Bifocal lens is used in
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myopia
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lever
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Cataract
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Presbyopia
Explanation
Presbyopia
Stars appears to be twinkling because of
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atmospheric refraction
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reflection
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Tyndall effect
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spectrum
Explanation
atmospheric refraction
A deviation in the path of a ray of light can be produced
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by a glass prism but not by a rectangular glass slab
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neither by a glass prism nor by a rectangular glass slab
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by a rectangular glass slab but not by a glass prism
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by a glass prism as well as a rectangular glass slab
The sky looks blue on a clear, sunny day because of
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reflection of light
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scattering of light
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dispersion of light
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refraction of light
Other names for myopia are
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near-sightedness and short-sightedness
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near-sightedness and presbyopia
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long-sightedness and hyperopia
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hyperopia and hypermetropia
When light rays are incident on the eye, maximum deviation takes place at the cornea.
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True
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False
The inability among the elderly to see nearby objects clearly because of the weakening of the ciliary muscles is called
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myopia
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near-sightedness
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far-sightedness
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presbyopia
When white light passes through a prism, it splits into its component colors. This phenomenon is called
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spectrum
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dispersion
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reflection
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refraction
The muscles of the iris control the
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opening of the pupil
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shape of the crystalline lens
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focal length of the eye lens
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optic nerve
For the myopic eye, the far point is farther away than normal.
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True
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False
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