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Question

Find the value of sinθglass in the diagram given below.
Given:
nglass=1.5


A
32
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B
2
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C
13
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D
12
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Solution

The correct option is C 13
Using snell's law at the first boundary:
nairsinθair=nwatersinθ...(i)

Using snell's law at the second boundary:
nwatersinθ=nglasssinθ1...(ii)

Equating (i) and (ii),
nairsinθair=nglasssinθ1
​​​​​​​1×32=1.5×sinθ1
sinθ1=13

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