Two identical thin plano concave lenses u 1 5 each having

Last updated: 6/24/2023

Two identical thin plano concave lenses u 1 5 each having radius of curvature 30 cm are placed in contact with common axis as shown in the figure If the intervening space is filled with oil of refractive index 1 8 the focal length of the combination is 50 cm 50 cm 25 cm 25 cm