Question

Light travels in ________ lines.

Answer 1

Light:

1. Light is a form of energy that enables us to see the objects around us.
2. Light travels in a straight line so it always does rectilinear propagation.
3. Light is the transfer of energy from one place to another.
4. Due to the rectilinear propagation i.e straight-line motion of light, shadows are formed.
5. Light is an electromagnetic wave so it does not require any medium to travel.
6. The speed of light in air or vacuum is $3\times {10}^{8}m/s$.
7. The speed of light changes while going from one medium to another medium.

Hence, Light travels in straight lines.