Question

3. Light travels in ______
______is a must for a shadow to be visible.
5. Working of a sewing machine is an example of_______ motion
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Answer 1

Answer:

The answer is

1. Light can travel in vacuum
2. Light is a must for a shadow to be visible
3. working of a sewing machine is an example of periodic oscillatory motion

hope this helps u ☺️✌

Answer 2

Answer:

3) light travels in vacuum

4) Light is a must for a shadow to be visible.

5) working of a sewing machine is an example of periodic oscillatory

I hope this help you brother ☺️