Question

Which one of the following statements is not true about thermal radiations?

• A. All bodies emit thermal radiations at all temperatures
• B. Thermal radiations are electromagnetic waves
• C. Thermal radiations are not reflected from a mirror
• D. Thermal radiations travel in free space with a velocity of $3\times {10}^{8}m{s}^{-1}$

Answer 1

The correct option is C

Thermal radiations are not reflected from a mirror

Thermal radiations obey the laws of reflection.