Infra red radiation is detected by
Infra red radiation is detected by
- photometer
- nanometer
- spectrometer
- pyrometer
Answer
A photometer is an instrument that measures light intensity or optical properties. Nanometer is unit of length. Spectrometer is an apparatus used for recording and measuring spectra.
A pyrometer is a type of remote-sensing thermometer used to measure the temperature of a surface. Infrared radiation can be detected by pyrometer.
The correct option is D.