Which one of the following thermometers is known as pyrometer?
(a) Thermo-electric thermometers
(b) Radiation thermometers
(c) Gas thermometers
(d) Liquid thermometers
Answer: (b) Radiation thermometers
(a) Thermo-electric thermometers
(b) Radiation thermometers
(c) Gas thermometers
(d) Liquid thermometers
Answer: (b) Radiation thermometers