Physics · Optics
During eye-testing, opticians measure the 'power of lens'. What does this denote?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The power of a lens is defined as the reciprocal of its focal length.✓
- 2The power of a lens is defined as the ratio of its height and breadth.
- 3The power of a lens is defined as the reciprocal of its height.
- 4The power of a lens is defined as equivalent to its focal length.
Correct answer
The power of a lens is defined as the reciprocal of its focal length.
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