Which of the following is the principle of Golay cell which is used as a detector in IR spectroscopy?
A. Expansion of gas upon heating
B. Increase in resistance due to increase in temperature and vice versa
C. Temperature difference gives rise to a potential difference in the material
D. Decrease in resistance due to increase in temperature
Answer:A
Which of the following is the principle of Golay cell which is used as a detector in IR spectroscopy?
A. Expansion of gas upon heating B. Increase in resistance due to increase in temperature and vice versa C. Temperature difference gives rise to a potential difference in the material D. Decrease in resistance due to increase in temperature
Explanation: It is also known as pneumatic detector. The gases expand on heating and this in turn leads to the movement of a diaphragm just like in pneumatic sensors.