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15 questions
The perpendicular drawn to the reflecting surface is called
reflected ray
dispersion
incident ray
normal
If two plane mirrors are inclined at an angle of 40°, number of images formed will be
9
8
6
5
Band of seven colours is called
spectrum
dispersion
VIBGYOR
reflection
Two mirrors A and B are placed at right angles to each other. A ray of light incident on mirror A at an angle of 25° falls on mirror B after reflection. The angle of reflection for the ray reflected from mirror B would be
25°
50⁰
115°
65°
A toy is placed at 10 cm in front of a plane mirror. What is the distance of image from the mirror?
10 cm
15 cm
30 cm
20 cm
The angle between the reflected ray and the normal at the point of incidence is called angle of incidence.
True
False
In mirror, the size of the image is the same as the size of the object.
True
False
Real images are formed on the screen.
True
False
Maybe
Rods are sensitive to bright light.
False
True
In bright light the size of the pupil is smaller.
True
False
Two persons on the surface of moon cannot talk to each other.
True
False
When lightning strikes, the sound is heard a little after the flash is seen.
True
False
The optical device used to see objects that are not along the line of sight is kaleidoscope.
False
True
Laws of reflection of light are two.
True
False
Second law of reflection states that angle of incidence is always equal to angle of reflection.
True
False
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