1. What is Ohmmeter?
An instrument used for measuring electrical resistance of objects
2. What is Ondometer?
An instrument used for measuring the frequency of electromagnetic waves(radio waves)
3. What is Optometer?
An instrument used for testing the refractive power of the eye.
4. What is Otoscope?
An instrument used for visual examination of the eardrum.
5. What is Periscope?
An instrument used for viewing objects above sea level in submarines
6. What is Phonograph?
An instrument used for reproducing sound
7. What is Photometer?
An instrument used for comparing the luminous intensity of the two sources of light
8. What is Polygraph?
An instrument used for simultaneously recording changes in physiological processes such as heartbeat, blood pressure & the respiration (used as lie detector)
9. What is Pyknometer?
An instrument used for measuring the density and coefficient of expansion of liquids.
10. What is Pyrheliometer?
An instrument used for measuring Solar radiation.
11. What is Pyrometer?
An instrument used for measuring very high temperature.
12. What is Quadrant?
An instrument used for measuring altitudes and angles in navigation and astronomy
13. What is Radar?
An instrument used for measuring Radio, Detection and Ranging.
14. What is Radio Micrometer?
An instrument used for measuring heat radiation
15. What is Rain Gauge?
An instrument used for measuring Rainfall
16. What is Refractometer?
An instrument used for measuring salinity of solutions
17. What is Salinometer?
An instrument used for determining the salinity of solutions
18. What is Sextant?
An instrument used for measuring the latitude of place by measuring the elevation above the horizon of the sun or another star; also used to measure the height of very distant objects
19. What is Siesmograph?
An instrument used for recording the intensity and origin of earthquakes shocks
20. What is Spectrometer?
An instrument used for measuring the position of spectral lines (refractive indices )
21. What is Spectroscope?
An instrument used for measuring Spectrum analysis.
22. What is Speedometer?
An instrument used for measuring speed of the vehicle
23. What is Spherometer?
An instrument used for measuring curvature of spherical objects