A crown glass prism with refracting angle 6o is to be achromatized for red and blue light with a flint glass prism. The angle of the flint glass should be (Given μr = 1.513, μb = 1.523 for crown glass and μr = 1.645, μb = 1.665 for flint glass)

A crown glass prism with refracting angle 6o is to be achromatized fo

1.	A crown glass prism with refracting angle 6o is to be achromatized for red and blue light with a flint glass prism. The angle of the flint glass should be (Given μr = 1.513, μb = 1.523 for crown glass and μr = 1.645, μb = 1.665 for flint glass)
A.	1.5o
B.	2.4o
C.	3o
D.	4.5o
Answer» D. 4.5o

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A crown glass prism with refracting angle 6o is to be achromatized for red and blue light with a flint glass prism. The angle of the flint glass should be (Given μr = 1.513, μb = 1.523 for crown glass and μr = 1.645, μb = 1.665 for flint glass)

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