1.

A ray of light passes through a prism whose refracting angle is 5^(@) and dispersive power is 0.03. The refractive index for the mean ray in a spectrum is 1.62. The mean deviation and angle of dispersion respectively are

Answer»

`3.1^(@),0.077^(@)`
`3.1^(@),0.093^(@)`
`6.2^(@),0.093^(@)`
`6.2^(@),0.077^(@)`

Solution :`delta_(4)(mu_(4)-1)A=(1.62-1)xx5^(@)`
`=0.62xx5=3.1^(@)`
`theta=delta_(b)-delta_(R)=omegaxxdelta0.03" "5(1.62-1)xx5`
`=0.093^(@)`


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