The refractive indices of the material of a lens for violet, yellow and red colours of light are respectively 1.66,1.64 and 1.62. The mean focal length of the lens is 10cm. Determine the chromatics aberration of the lens between the violet and the red colors.
Open in App
Verified by Toppr
Correct option is D)
Let ω be the dispersive power of the material of the lens. Then, the chromatic aberration between violet and red colors is given by: fR−fV=ω×fY=(nY−1nV−nR)fY=(1.64−11.66−1.62)×10=0.625cm
Solve any question of Ray Optics and Optical Instrument with:-