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A small angled prism of refrative index 1.7 gives a deviation of 4.9^@. The angle of prism is .......

Answer»

`5^@`
`7^@`
`9^@`
`11^@`

SOLUTION :For prism of small prism ANGLE,
`delta=A(n-1)`(n=1.7,`delta=4.9^@`)
`THEREFORE 4.9^@=A(1.7-1)`
`thereforeA=(4.9^@)/(0.7^@)=7^@`


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