Ray Optics and Optical Instruments

Related Questions

• An object is immersed in a fluid. In order that the object becomes invisible, it should

  ---

• 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

  ---

• When the object is self-luminous, the resolving power of a microscope is given by the expression

  ---

• Two thin lenses of focal lengths ${{f}_{1}}$ and ${{f}_{2}}$ are in contact and coaxial. The combination is equivalent to a single lens of power

  ---

• A person wears glasses of power – 2.0 D. The defect of the eye and the far point of the person without the glasses will be

  ---