Ray Optics and Optical Instruments

Related Questions

• The critical angle of a medium with respect to air is ${{45}^{o}}$. The refractive index of medium is

  ---

• The Cauchy’s dispersion formula is

  ---

• A man can see the objects upto a distance of one metre from his eyes. For correcting his eye sight so that he can see an object at infinity, he requires a lens whose power is

  ---

• A fish at a depth of 12 cm in water is viewed by an observer on the bank of a lake. To what height the image of the fish is raised.

  ---

• If in a plano-convex lens, the radius of curvature of the convex surface is 10 cm and the focal length of the lens is 30 cm, then the refractive index of the material of lens will be

  ---