Question

.Which instrument is used to measure

very high temperatures?

A. Machmeter

B. Photometer

C. Pyknometer

D. Pyrometer​

Answer 1

Ans. D

Sol. A pyrometer is a device for

measuring very high temperatures and

uses the principle that all substances emit

radiant energy when hot, the rate of

emission depending on their

temperature. There are two main types of

pyrometer, namely the total radiation

pyrometer and the optical pyromete