Ray Optics and Optical Instruments

Bihar Board Class 12 · Physics · 73 past questions

2 of 73 · show all

1. Q72 2017

   The focal length of a lens $\mu=1.5$ in air is 20 cm. Its focal length is medium of refractive index 1.5 is-

   Try it →
2. Q73 2017

   A point object is placed above principle axis at a distance three times focal length of a convex lens. Draw… (with a figure)

   Try it →