Question

Which of the following is not always necessary for the formation of shadow?

1) Screen
2) source of light
3) Sun​

Answer 1

Option 3 is correct

Sun

Explanation:

• Shadows are formed when light travels in straight lines.
• On a cloudy day, there may appear to be no shadows.
• If you stand with your back to the sun on a clear day, though, you will surely see your shadow.
• Shadows are generated when an opaque object or material is placed in the path of light rays.
• Because the opaque substance is opaque, light cannot move through it.
• Light rays penetrate through the material's boundaries, forming the shadow.
• The umbra is the darkest part of the shadow, receiving no light.

Answer 2

"The Sun​"

Explanation:

The right response is choice (c) Sun. Shadow can be framed from different wellsprings of light additionally, similar to, light.

Shadows are framed when an opaque article or material is put in the way of beams of light.

(1) There ought to be a dark material.

(2) There ought to be a wellspring of light and screen. The item should be set in the way of light. Then, at that point, shadow is shaped on the screen.