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  • A prism is made up of flint glass whose dispersive power is 0.053 . Find the angle of dispersion if the mean refractive index of flint glass is 1.68 and the refracting angle of prism is <img alt="3

A prism is made up of flint glass whose dispersive power is 0.053 . Find the angle of dispersion if the mean refractive index of flint glass is 1.68 and the refracting angle of prism is 3^{\circ}.

Option: 1

20.08^{\circ}


Option: 2

10.08^{\circ}


Option: 3

0.208^{\circ}


Option: 4

0.108^{\circ}


Answers (1)

best_answer

As the refracting angle is small deviation \mathrm{=(\mu-1) A}

angle of dispersion \mathrm{=D_{v}-D_{r}}

\mathrm{=\left(m_{q}-1\right) A-(m-1) A }
\mathrm{ =\left(m_{q}-m\right) A }

\mathrm{=\frac{ \ae- m_{q}\ddot{o} }{\OE m_{mean}-1}\div A\left ( m_{mean}-1 \right )}

=\mathrm{wA}\left(\mathrm{m}_{\text {mean }}-1\right)

=(0.053)^{\prime} 3^{\prime}(1.68-1)=0.108^{\circ}
 

Posted by

Ritika Kankaria

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