A crown glass prism with refracting angle 5° is to be achromatised for red and blue light with flint glass prism. Angle of the flint glass prism should be ( Given for grown glass mu_(r)-1.513, mu_(b)= 1.523, for flint glass mu_(r)=1.645,mu_(b)=1.665)

A crown glass prism with refracting angle 5° is to be achromatised fo

1.	A crown glass prism with refracting angle 5° is to be achromatised for red and blue light with flint glass prism. Angle of the flint glass prism should be ( Given for grown glass mu_(r)-1.513, mu_(b)= 1.523, for flint glass mu_(r)=1.645,mu_(b)=1.665)
Answer» 1.5° 3° 2.4° `4.5^@` SOLUTION :`(mu_(b)-mu_(r))A_(C)=(mu_(b)^(.) - mu_(r)^(.))A_(F)`

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A crown glass prism with refracting angle 5° is to be achromatised for red and blue light with flint glass prism. Angle of the flint glass prism should be ( Given for grown glass mu_(r)-1.513, mu_(b)= 1.523, for flint glass mu_(r)=1.645,mu_(b)=1.665)

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