Question

what is the length of the radius of curvature of focal length at a plane mirror​

Answer 1

║⊕ANSWER⊕║

• Focal length of a plane mirror is infinity.
• A plane mirror can be considered as a spherical mirror of infinite radius of curvature.
• Focal length is half of radius of curvature and hence it is infinity.
• The plane mirror has to be taken as a very very small part of a spherical mirror.
• Therefore the radius of curvature will be very very large that we will have to consider it to be at infinity.
• So the radius of curvature of a plane mirror is at infinity.

Answer 2

Question :-

what is the length of the radius of curvature of focal length at a plane mirror??

Answer :-

➝ A plane mirror can be considered as a spherical mirror of infinite radius of curvature.

➝ Focal length is half of radius of curvature and hence it is infinity.

➝ We can use the mirror formula also to get the focal length of a plane mirror, where the image distance = − object distance.