Home Physics Ray Optics Karnataka - CET Previous Year Question Focal length of a conver lens will be maximu…
Physics Ray Optics Karnataka - CET Previous Year Question MCQ (Single Correct)

Focal length of a conver lens will be maximum for

A
Green light
B
Blue light
C
Red light
D
Yellow light

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The correct answer is:
C

: From lens maker's formula,

It is evident that, focal length and wavelength are related as,

Therefore, out of the given options, red light has maximum wavelength, thus lens have maximum focal length for red.

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