Question

the correct statement related to
thermal radiation is-----​

Answer 1

• all body emits thermal radiation at all temperature
• thermal radiation are electromagnetic waves
• thermal radiation travel in free space with a velocity 3×10⁸ms-¹

Answer 2

The correct statement related to thermal radiation is that it is a form of electromagnetic radiation emitted by a surface due to its temperature and does not require a medium for its propagation.

As per the question given,

Thermal radiation includes all types of electromagnetic waves with different wavelengths and frequencies, such as infrared radiation, visible light, and ultraviolet radiation. The amount of thermal radiation emitted by an object depends on its temperature and its emissivity, which is a measure of how efficiently it can emit radiation.

Darker and rougher surfaces have higher emissivity than shiny and smooth surfaces, and thus, they emit more thermal radiation for a given temperature. Thermal radiation plays an important role in various natural phenomena, such as the Earth's energy balance, atmospheric heating, and the greenhouse effect.

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