Question

Speed of light in glass is $3\times {10}^{8}m/s$.

• A. True
• B. False

Answer 1

The correct option is B False

1. Light is a form of energy that enables us to see the objects around us.
2. Light is an electromagnetic wave.
3. Light does not require any material medium for its propagation.
4. Speed of light in air or vacuum is maximum i.e $3\times {10}^8$$m/s$.
5. The speed of light in glass is $2\times {10}^8$$m/s$.
6. Speed of light changes while going from one medium to another medium.

As, the speed of light in glass is $2\times {10}^8$$m/s$. Hence the statement of the question is false.