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?

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SSC CGL 2022 Tier-I Official Paper (Held On : 12 Dec 2022 Shift 4)
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  1. Viscometer
  2. Spherometer
  3. Verniercaliper
  4. Screw gauge

Answer (Detailed Solution Below)

Option 2 : Spherometer
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Detailed Solution

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The correct answer is Spherometer.

Key Points

  • Spherometer
    • A spherometer is a precision instrument used to measure the radius of curvature of a spherical surface.
    • It is commonly used in fields such as optics and mechanical engineering to measure the radii of curvature of lenses, mirrors, and other curved surfaces.

Additional Information

  • Viscometer
    • A viscometer is an instrument used to measure the viscosity or flow properties of fluids
    • There are many different types of viscometers, including capillary viscometers, rotational viscometers, and falling ball viscometers.
    • They help to determine the shear rate, shear stress, and yield stress of fluids, which are used to predict how they will behave under various conditions.
  • Verniercaliper
    • A Vernier caliper is a precision measuring instrument used to measure the internal and external dimensions of an object with high accuracy.
    •  It consists of two scales, the main scale, and the Vernier scale.
    • The main scale of the Vernier caliper is typically marked in millimeters or inches.
    • The Vernier scale is a secondary scale that slides along the main scale and has smaller graduations, allowing for more precise readings.
  • Screw gauge
    • A screw gauge, also known as a micrometer screw gauge, is a precision measuring tool used to measure the diameter of small objects with high accuracy.
    • It consists of a C-shaped frame, a spindle, a thimble, and a screw.
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