Bolometer is used to measure (a) Frequency (b) Temperature (c) Velocity (d) Wavelength
Option B. A bolometer is a tool for measuring the energy of incident electromagnetic radiation through the heating of a cloth with a temperature-based electric resistance. It turned into invented in 1878 through the American astronomer Samuel Pierpont Langley. A bolometer includes an absorptive detail, inclusive of a skinny layer of metal, related to a thermal reservoir (a frame of regular temperature) thru a thermal link. The end result is that any radiation impinging at the absorptive detail increases its temperature above that of the reservoir — the more the absorbed strength, the better the temperature.
