Teaching EMRS PGT Mock Test 2023 Physics Optics Refraction and Reflection

Light of wavelength 600 nm in air enters a glass slab of refractive index 1.5. The wavelength of light in glass slab is:

1
2 × 10-7 m
2
2 × 10-4 ma
3
4 × 10-7 m
4
4 × 10-4 m
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