WorksheetsLight
Total questions: 10
Worksheet time: 6mins
Theangle of reflection is equal to the angle of incidence
always
sometimes
under special circumstances
never
The image formed by a plane mirror is
real, at the surface of the mirror and enlarged
real, at the surface of the mirror and the same size as the object
Virtual, behind the mirror and enlarged
Virtual, behind the mirror and the same size as the object
The least distance of distinct vision for a young adult with normal vision is about
25 m
2.5 cm
25 cm
2.5 m
A device which works on the reflection of light from two plane mirrors arranged parallel to one another is
Electroscope
kaliedoscope
Periscope
Stethoscope
The number of images formed when of an object placed between two plane mirrors inclined at right angles to each other is
two
five
one
three
As the angle between two plane mirrors is decreases gradually, the number of images of an object placed between them
increases gradually
Decreases gradually
First increases then decreases
First decreases then increases
The change in the converging power of an eye lens is caused by the action of
iris
ciliary muscles
optic nerve
retina
The size of the pupil of the eye is adjusted by
cornea
ciliary muscle
optic nerve
iris
The defect of vision in which the eye lens of a person gets progressively cloudy resulting in blurred vision is called
myopia
night blindness
cataract
hypermetropia
Which of the following changes occur when you walk out of bright sunshine into poorly lit room?
The pupil becomes larger
The lens becomes thicker
The ciliary muscle relaxes
The pupil becomes smaller
