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The curve of angle of incidence versus a...


The curve of angle of incidence versus angle of deviaton wshown has been plotted for prism.
Q. The value of angle I, in degrees is

A

`40^(@)`

B

`60^(@)`

C

`70^(@)`

D

`90^(@)`

Text Solution

Verified by Experts

When angle of incidence is `i_(1),e=40^(@)`
(From reversibility of ray)
`therefore70^(@)=i_(1)+40^(@)-A`
`thereforei_(1)=90^(@)`
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