Give 2 physical evidences that light travels in straight line?

Answer 1

1. You cannot see objects that are behind objects you have clear vision of.

2. Any object behind a light source is invisible

Answer 2

Shadows are sharp and well-defined, showing that light travels in straight lines by blocking it and creating distinct boundaries. The formation of rainbows demonstrates how light bends or refracts when passing through different mediums, confirming that it travels in straight lines when not influenced by optical distortions.