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