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| Q. |
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 an increase in temperature and vice versa |
| C. | temperature difference gives rise to a potential difference in the material |
| D. | decrease in resistance due to an increase in temperature |
| Answer» A. expansion of gas upon heating | |
| 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. | |
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