Question

a double convex lens is madr of glass which has its refractive index 1.55 for voilet rays and 1.50 for red rays if the focal length of the voilet rays is 20 cm, the focal length for the red rays will be answer this question i will mark as brainliest and follow him who answer​

Answer 1

Answer:

22cm

Explanation:

radius of the curvature of sides R1 and R2