Propagation of Light
Trending Questions
Q.
A student had a ball, a screen, and a torch in working condition. He tried to form a shadow of the ball on the screen by placing them at different positions. Sometimes the shadow was not obtained. Explain.
Q.
What are shadows ?
Q.
Name a medium through which light propagates easily.
Q.
Why are moon and planets considered as non-luminous objects.
Q.
Why do the opaque objects cast a dark shadow?
Q.
Choose the correct options and fill in the blank:
The Sun is a __________ (luminous/ non-luminous) object whereas the moon is a _________ (luminous/ non-luminous) object.
Q. Arrange the following events in the correct order:
- Reflected light enters our eye
- Image formation
- Light from a source
- Object reflects light
- Light falls on an object
- 3−4−5−2−1
- 3−5−4−1−2
- 2−1−4−3−5
- 3−5−4−2−1
Q.
Vacuum is a transparent optical medium.
- True
- False
Q.
Translucent objects form a faint shadow.
- True
- False
Q. If a source moves from point A to B, does the size and shape of the shadow change?
Q.
Umbra is the central part of a shadow that receives no light.
- True
- False
Q. Shadow of an object is formed when the object:
- Allows the light to pass through it
- Bounces back light
- Absorbs light
- Bends light
Q. A football match is being played at night in a stadium with flood lights ON. You can see the shadow of a football kept at the ground but cannot see its shadow when it is kicked high in the air. Explain.
Q. A football match is being played at night in a stadium with flood lights ON. You can see the shadow of a football kept at the ground but cannot see its shadow when it is kicked high in the air. Explain.
Q. When an object moves closer to a light source, its shadow gets smaller.
- False
- True
