1.

(4) Polarisation8. For an angle of incidence of 45" at the top surface of a glass slab as shown in figuro, what inthe maximum refractive index of glass for total internal reflection? | For water μ--Water45 Glass(1 32

Answer»

we will use Snell's law n1sin∅1 = n2sin∅2 n1 = x , sin∅1 = 45° , n2=4/3 and sin∅2 = 90°( for total internal reflection)

so, n1sin∅1 = n2sin∅2 => x*(1/√2) = (4/3)*(1) => x = 4√2/3

option 1



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