Shadows

Q. Shape and size of a shadow depends on:

1. Angle at which light falls on the object.
2. Colour of the object.
3. Distance between the source of light and the object.
4. Distance between the object and the screen.

Q. An object is placed in between a light source and a screen. Which of the following statements are true?

1. A shadow is formed, if it completely allows light to pass through it.
2. A shadow is formed, if it bounces back all the light.
3. A shadow is formed, if it absorbs all the light.
4. A shadow is formed, if it either transmits or absorbs the light.

Q.

Can a completely transparent object cast a shadow?

Q. Which of the following statements is true?

1. Shadow is formed when a transparent object comes in the path of light.
2. Shadow is formed when an opaque object comes in the path of light.
3. Shadow is formed when a transparent object comes in the path of sound.
4. Shadow is formed when an opaque object comes in the path of sound.

Q.

Look at the given figure. Will there be any difference in the shadow formed on the screen in $A$ and $B$?

Q.

Shadows are formed by ___________ materials.

Q.

Shadows are ___ from images.

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.