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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:

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.
    ഒരു കോൺകേവ് ദർപ്പണത്തിന്റെ Fനും Pക്കും ഇടയിൽ വച്ചിരിക്കുന്ന വസ്തു രൂപികരിക്കുന്ന പ്രതിബിംബത്തിന്റെ സ്വഭാവം എന്ത്?

    A spherical mirror converges a beam of light, at a given point on the principal axis. Which of the following statement(s) about the mirror is are true?

    1. (a) The mirror used in concave
    2. (b) The mirror has positive focal length
    3. (c) The point of convergence is the principal focus of the mirror
      The magnification produced by a spherical mirror is -0.5. The image formed by the mirror is?
      What is the distance of the principal focus F from the pole P of the spherical mirror called?