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Physics-

General

Easy

Question

A prism having an apex angle 4^o and refraction index 1.5 is located in front of a vertical plane mirror as shown in figure. Through what total angle is the ray deviated after reflection from the mirror

176^o
4^o
178^o
2^o

The correct answer is: 178^o

$delta subscript Pr invisible function application i s m end subscript equals left parenthesis mu minus 1 right parenthesis A equals left parenthesis 1.5 minus 1 right parenthesis 4 to the power of o end exponent equals 2 to the power of o end exponent$
$delta subscript T o t a l end subscript equals delta subscript Pr invisible function application i s m end subscript plus delta subscript M i r r o r end subscript$
$equals left parenthesis mu minus 1 right parenthesis A plus left parenthesis 180 minus 2 i right parenthesis equals 2 to the power of o end exponent plus left parenthesis 180 minus 2 cross times 2 right parenthesis equals 17 8 to the power of o end exponent$

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