Ray Optics and Optical Instruments

Related Questions

• The velocity of light in a medium is half its velocity in air. If ray of light emerges from such a medium into air, the angle of incidence, at which it will be totally internally reflected, is

  ---

• The relation between the linear magnification $m,$ the object distance $u$ and the focal length $f$ is

  ---

• Two lenses of power + 12 and – 2 diopters are placed in contact. The combined focal length of the combination will be

  ---

• The distance between an object and the screen is 100 cm. A lens produces an image on the screen when placed at either of the positions 40 cm apart. The power of the lens is

  ---

• A rectangular tank of depth 8 meter is full of water ($\mu =4/3$), the bottom is seen at the depth

  ---