Types of Objects

Q.

Which of the following is a luminous object?

1. Moon

2. Human

3. Stars

4. Sun

Q. The shadow formed due to a point source of light has_____.

1. Only umbra region
2. Only penumbra region
3. Both umbra and penumbra regions
4. Depends on the distance of source from the obstacle

Q. Red light is allowed to fall on a blue object. It will appear:

1. Red
2. Blue
3. Black
4. None of these

Q. Stars emit light.

1. True
2. False

Q. The shadow of a/an object will be more prominent than the shadow of a/an object under the same conditions.

1. opaque
2. translucent
3. light
4. heavy

Q. We cannot see objects which do not emit light.

1. True
2. False

Q. When a beam of light is projected, objects cast a shadow, while objects do not.

1. opaque
2. transparent
3. light
4. heavy

Q. Moon emits light.

1. False
2. True

Q. Identify the opaque object.

1. Water
2. Air
3. Wood
4. Glass

Q. Opaque objects _____ light.

1. allows
2. absorb
3. block
4. reflect