How does the eye change, in order to focus on near or distant objects?
the lens moves in or out
the retina moves in or smaller
the lens becomes thicker or thinner
the pupil becomes larger or smaller
Which of the following is not a part of the human eye?
retina
auditory nerve
optic nerve
ciliary muscle
An incident ray makes an angle of 650 with the surface of a plane mirror. The angle of reflection in this case will be:
650
450
250
350
Which of the following produces diffuse reflection of light?
mirror on a dressing table
water surface of a pond
screen in a cinema hall
polished wooden table
Which of the following is a non-luminous object?
sun
star
moon
fire
The electric nature of lightning was established by a scientist named:
Isaac Newton
Robert Hooke
Benjamin Franklin
Thales
Regular reflection takes place when surfaces are
rough
uneven
unpolished
smooth
The size of the pupil of the eye is adjusted by:
cornea
ciliary muscles
iris
The human eye forms the image of an object at its:
pupil
Night blindness occurs due to deficiency of which vitamin?
A
B
C
D
