The SI unit of power of lens is ______.

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SSC MTS (2022) Official Paper (Held On: 10 May, 2023 Shift 2)
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  1. candela
  2. mole
  3. watt
  4. dioptre

Answer (Detailed Solution Below)

Option 4 : dioptre
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SSC MTS 2024 Official Paper (Held On: 01 Oct, 2024 Shift 1)
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Detailed Solution

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The correct answer is dioptre.
Key Points
  • Dioptre is the SI unit of power of the lens, which measures the refractive power of a lens or the ability of a lens to bend light.
  • Candela is the SI unit of luminous intensity, which measures the amount of light emitted per second in a particular direction.
  • Mole is the SI unit of amount of substance, which measures the number of elementary entities (such as atoms, molecules, ions, etc.) in a given sample of matter.
  • Watt is the SI unit of power, which measures the rate of energy transfer or conversion per unit time.
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