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A light ray passes from air through a thin rectangular plastic slab (refractive index = 1.3). If the ray in air makes an angle of 45∘ with the normal after leaving the slab, what is the angle of incidence for the light falling on the plastic slab? |
| Answer» A light ray passes from air through a thin rectangular plastic slab (refractive index = 1.3). If the ray in air makes an angle of 45∘ with the normal after leaving the slab, what is the angle of incidence for the light falling on the plastic slab? | |