ICSE Class 10 Answered
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Asked by Sunita | 24 Sep, 2018, 09:20: PM
Expert Answer
when the light ray incident on glass Slab-1 with incidence angle i,
we have as per laws of refraction,
where r1 is the angle of refraction in slab-1
when the refracted ligh ray in slab-1 travels to slab2, then we have
where r2 is the angle of refraction in slab-2
when the refracted light ray emerging out of slab-2, then we have
θ = 90 - r3 ................................(4)
from eqn.(3), eqn.(2) and eqn.(1), we have, ...........(5)
hence angle r3 = angle i or θ = 90 - i
Answered by Thiyagarajan K | 25 Sep, 2018, 12:34: PM
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