Question

Which of the following is not a property of light?

• A. It requires a material medium for propagation
• B. It can travel through vacuum
• C. It involves transportation of energy
• D. It has finite speed

Answer 1

Answer: (A)

It requires a material medium for propagation

Answer 2

Light waves do not require a material medium for their propagation. Also they travel through vacuum. $A$ metallic plate kept in the path of light rays gets heated up, showing that light involves transportation of energy. Also speed of light is $3 \times 10^{8} m / s$ which is constant.