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| Q.3 | Which measuring instrument consists of a metal triangular frame supported on three legs, used to measure the radius of curvature of an object such as lenses and curved mirrors which are spherical in shape? | |
| Ans | 1. Spherometer | |
| 2. Verniercaliper | ||
| 3. Screw gauge | ||
| 4. Viscometer |
Correct Ans Provided: 1
