Shadow

Q.

Celestial bodies do not form umbra and penumbra.

1. False

2. True

Q. Shadows can form without the presence of light.

1. False
2. True

Q. Shadows are formed when light is blocked by some object.

1. True

2. False

Q. Whenever light falls on an opaque object, a shadow always appears on the background.

1. False
2. True

Q. What are the parameters to change size of the shadow?

1. Different time intervals

2. The size of shadow cannot be changed.

3. Distance between the object and the source of light.

4. Distance between the object and the shadow.

Q. The dark region which is formed when the path of light is blocked by an opaque object is called the .

1. shadow
2. image
3. mirage

Q. The day on which the sun reaches exactly overhead is called:

1. Zero shadow day
2. Solar eclipse
3. Lunar eclipse
4. Occultation

Q.

When an object obstructs the path of light, the dark area formed on the screen is called________.

1. shadow

2. mirage

3. reflection

4. image

Q. Which of the following does not decide the size of the shadow?

1. Intensity of light.
2. Size of the object.
3. Distance between object and screen.
4. Distance between the object and source of light.

Q. Which of the following is necessary for the formation of a shadow?

1. Glass

2. Mirror

3. Light

4. Lens