Ray Optics and Optical Instruments

Related Questions

• A double convex lens is made of glass of refractive index 1.5. If its focal length is 30 cm, then radius of curvature of each of its curved surface is

  ---

• Missing lines in a continuous spectrum reveal

  ---

• In the formation of primary rainbow, the sunlight rays emerge at minimum deviation from rain-drop after

  ---

• Which of the following spectrum have all the frequencies from high to low frequency range

  ---

• A ray of light is incident at an angle i from denser to rare medium. The reflected and the refracted rays are mutually perpendicular. The angle of reflection and the angle of refraction are respectively r and r’, then the critical angle will be

  ---