Ray Optics and Optical Instruments

Related Questions

• The image formed by a convex mirror of focal length $30cm$ is a quarter of the size of the object. The distance of the object from the mirror is

  ---

• On heating a liquid, the refractive index generally

  ---

• The magnifying power of a simple microscope is 6. The focal length of its lens in metres will be, if least distance of distinct vision is 25$cm$

  ---

• From which source a continuous emission spectrum and a line absorption spectrum are simultaneously obtained

  ---

• All of the following statements are correct except

  ---