Physics · Wave Optics
When a thin film of thickness t and refractive index μ is placed in the path of a light wave emerging from a slit, the increase in the length of the optical path is given by:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1μt
- 2μt
- 3(μ + 1) t
- 4(μ - 1) t✓
Correct answer
(μ - 1) t
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