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The radius of curvature of a given spherical mirror is-20 cm. The focal length of the mirror is?

A-10 cm

B40 cm

C10 cm

D-40 cm

Answer:

A. -10 cm

Read Explanation:

  • The focal length (f) of a spherical mirror is half of its radius of curvature (R).

  • The formula is: f = R/2.

  • Given R = -20 cm

  • therefore f = -20 cm / 2 = -10 cm.

Related Questions:

If a ray of light is incident passing through the center of curvature of a concave mirror, then the angle between the incident ray and the reflected ray will be equal to?
വാഹനങ്ങളിൽ റിയർവ്യൂ മിറർ ആയി ഉപയോഗിക്കുന്ന ദർപ്പണം ഏതാണ്
വ്യാസം 20 സെന്റീമീറ്റർ ഉള്ള ദർപ്പണത്തിന്റെ ഫോക്കസ് ദൂരം എത്രയാണ്?

A spherical mirror forms an erect and diminished image. Identify the correct statements about the spherical mirror.

  1. (A) The mirror is concave.
  2. (B) The mirror forms a virtual image.
  3. (C) The mirror has positive focal length.
    The distance between the pole and the center of curvature of a spherical mirror, in terms of its focal length f, is equal to: