1. The Instrument to measure relative humidity?
2. An Instrument to compare the luminous intensity of the sources of light?
3. The Instrument to measure the angular distances between two objects?
4. The apparatus used for measuring blood pressure?
5. A small device used to amplify current and perform the functions usually carried out by thermionic valve?
6. An adjustable scale to measure the small sub divisions?
7. A thermometer which measures very high temperatures?
8. The Instrument which measure heat radiation?
Ans: Radio micrometer.
9. The Instrument which determines the concentration of salt solutions?
10. The Instrument which creates three dimensional images body tissues?
Ans: CAT Scanner
11. A Device which measures density?