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Physics
The two lenses of an achromatic doublet should have
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Q. The two lenses of an achromatic doublet should have
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A
equal powers
B
equal dispersive powers
C
equal ratio of their power and dispersive power
D
sum of the product of their powers and dispersive power equal to zero
Solution:
The two lenses of an achromatic doublet should have, sum of the product of their powers and dispersive power $=$ zero.