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a ray of light is incident on glass slab r.i- 1.5 thickness t in such manner that the angle of refraction is 60 degree.if the speed of light in vacuum is c then time taken to cross the slab

ayusha , 7 Years ago
Grade 11
anser 1 Answers
Vikas TU

Last Activity: 5 Years ago

Dear student,
If the angle of refraction inside the slab is60 degree, the distance travelled by light inside the slab of thickness t is
d={t}/ cos60 = 2t
The speed of light in the glass medium={c}/{mu}={2c}/{3}
Hence time taken to cross the slab= {d}/{v}={3t}/{c}

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