MHT CET 2025 Physics question
A ray of light from a monochromatic point source of light is incident at a point on the screen. If a thin mica film of thickness 't' and refractive index 'n' is introduced in its path, then the optical path
Answer: (D)
Solution
Optical path in a medium is (refractive index) (geometric length). Without the film, the path through thickness is (air). With the film it is . The change is ,
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