Dev Dhawan Asked: January 8, 2025In: Class 12 Physics The focal length of a biconvex lens is equal to the radius of curvature of either face. What is the refractive index of the lens material? n = 1.5. Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Session 2024-2025. class 12 physicsrefractive index of the lens materialshort answer questions