Ray Optics and Optical Instruments

Related Questions

• When diameter of the aperture of the objective of an astronomical telescope is increased, its

  ---

• The focal lengths of the lenses of an astronomical telescope are 50 cm and 5 cm. The length of the telescope when the image is formed at the least distance of distinct vision is

  ---

• Myopia is due to

  ---

• In a simple microscope, if the final image is located at infinity then its magnifying power is

  ---

• Two lenses having ${{f}_{1}}:{{f}_{2}}=2:3$ has combination to make no dispersion. Find the ratio of dispersive power of glasses used

  ---