Question:
A meniscus lens have convex surface of curvature 20 cm and
Last updated: 6/9/2023
A meniscus lens have convex surface of curvature 20 cm and concave surface 30 cm If the lens is constructed of glass u 1 5 the focal length will be 1 4 cm 3 120 cm 2 4cm 4 120 cm l length