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The focal length of a converging lens are fv and fr for violet and red light
Physics
Dispersion and Spectra
Question
Updated
19 Aug 2026
The focal length of a converging lens are fv and fr for violet and red light respectively.
A
Choose Your Answer
A
f v > f r
B
f v = f r
C
f v < f r
D
Any of the three is possible depending on the value of the average refractive index μ.
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