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Bolometer is used to measure

A. Frequency

B. Temperature

C. Velocity

D. Wavelength

Answer: Option B

Solution(By Examveda Team)

A bolometer is a device for measuring the power of incident electromagnetic radiation via the heating of a material with a temperature-dependent electrical resistance. It was invented in 1878 by the American astronomer Samuel Pierpont Langley. A bolometer consists of an absorptive element, such as a thin layer of metal, connected to a thermal reservoir (a body of constant temperature) through a thermal link. The result is that any radiation impinging on the absorptive element raises its temperature above that of the reservoir — the greater the absorbed power, the higher the temperature.

This Question Belongs to General Knowledge >> Physics

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