Physics · 2020
JEE Main · 6 September 2020, Shift 2 · Q17
A double convex lens has power P and same radii of curvature R of both the surfaces. The radius of curvature of a surface of a plano-convex lens made…
A double convex lens has power P and same radii of curvature R of both the surfaces. The radius of curvature of a surface of a plano-convex lens made of the same material with power $\displaystyle 1.5$ P is :
Official answer
(1)
$\displaystyle \frac{R}{3}$
More from Ray Optics
- A convex lens of refractive index 1.5 and focal length f=18 cm is immersed in water. The difference in focal lengths of the given lens when it is in…2026
- A biconvex lens is formed by using two thin planoconvex lenses, as shown in the figure. The refractive index and radius of curved surfaces are also…2026
- For a transparent prism, if the angle of minimum deviation is equal to its refracting angle, the refractive index n of the prism satisfies.2026
- A slanted object AB is placed on one side of convex lens as shown in the diagram. The image is formed on the opposite side. Angle made by the image…2025
- A biconvex lens of refractive index 1.5 has a focal length of 20 cm in air. Its focal length when immersed in a liquid of refractive index 1.6 will…2024
- Distance between object and its image (magnified by -1/3 ) is 30 cm. The focal length of the mirror used is (x/4) cm, where magnitude of value of x…2025
- A ray of light passing through an equilateral prism is having velocity 2.12 × 10^8 m / s in the prism material, then the minimum angle of deviation…2026
- A point source of light S, placed at a distance 60 cm infront of the centre of a plane mirror of width 50 cm, hangs vertically on a wall. A man walks…2021
JEE Main 2020 Physics question, with the answer from NTA’s final answer key. Where our answers come from.