Question
Physics Question on Optical Instruments
The two lenses of an achromatic doublet should have
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
Answer
sum of the product of their powers and dispersive power equal to zero
Explanation
Solution
The two lenses of an achromatic doublet should have, sum of the product of their powers and dispersive power = zero.