A biconvex lens of refractive index with both radii of curvature is surrounded (on both its sides) by a medium of refractive index .A biconvex lens has radii of curvature, 20 cm each. If the refractive index of the material of the lens is 1.5, the power of the lens is:
NEET 2022 · Medium
The lens combination as shown in the figure, consists of two lenses, L_1 and L_2 , of the focal lengths +10 cm and -10 cm, respectively.…
RE-NEET 2026 · Medium
Two thin lenses are of same focal lengths ( f ), but one is convex and the other one is concave. When they are placed in contact with each…
NEET 2023 · Easy
A ray is incident at an angle of incidence i on one surface of a small angle prism (with angle of prism A ) and emerges normally from the…
NEET 2020 · Medium
Assume that light of wavelength 600 nm is coming from a star. The limit of resolution of telescope whose objective has a diameter of 2 m…
NEET 2020 · Easy
A light ray falls on a glass surface of refractive index 3 , at an angle 60°. The angle between the refracted and reflected rays would be:
NEET 2022 · Medium
