A person cannot see the distant objects clearly (though he can see the near by objects clearly).He is suffering from the defect of vision called :
cataract
hypermetropia
myopia
presbyopia
Linear magnification produced by a concave mirror may be :
less than 1 or equal to 1
more than 1 or equal to 1
less than 1,more than 1 or equal to 1
less than 1 or more than 1
The miror used by a dentist to examine the teeth of a person is :
convex
concave
plane
both concave and convex
A virtual image is one which
can be taken on a screen
cannot be taken on a screen
sometimes can be and sometimes cannot be taken on a screen
is formed only by a concave mirror
The size of the pupil of the eye is adjusted by :
cornea
ciliary muscles
optic nerve
iris
The term "accomodation" as applied to the eye,refers to its ability to :
control the light intensity falling on the retina
erect the inverted image formed on the retina
vary the focal length of the lens
vary the distance between the lens and retina
SI unit of power is
metre
horse power
dioptre
watt
A young man has to hold a book at arm's length to be able to read it clearly.The defect of vision is :
astigmatism
The refraction of light is commonly known as
bending
scattering
reflection
interference
A diverging lens is used in :
a magnifying glass
a car to see objects on rear side
spectacles for the correction of short sight
a simple camera
