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A ray of light passes through an equilat...

A ray of light passes through an equilateral prism in such a way that the angle of incidence becomes equal to the angle of emergence and each of these angles are `(3)/(4)`th of the angle of deviation. Determine the angle of deviation.

Text Solution

Verified by Experts

`"Here", A = 60^(@) and i_(1) = i_(2) = (3)/(4) delta`
`"Now", " " delta = i_(1) + i_(2) - A = (3)/(4) delta + (3)/(4)delta - 60^(@) = (3)/(2)delta - 60^(@)`
`or, " " (1)/(2)delta = 60^(@) or, delta = 120^(@)`
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