An achromatic convergent lens of focal length is made by combining flint-glass and…
PHYSICS · Subjective · CBSE · Physics · Ray Optics and Optical Instruments · Ray Optics and Optical Instruments
Problem
An achromatic convergent lens of focal length 150cm is made by combining flint-glass and crown-glass lenses. Calculate the focal lengths of both lenses and identify the divergent lens if the ratio of the dispersive powers of flint and crown glasses is 3:2.