Question

Important terms related to spherical mirror
.....also explain them???
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Answer 1

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Important terms related to spherical mirror:-

Pole (P): The midpoint of a spherical mitror.

Centre of curvature (C): The centre of the sphere that the spherical mirror was a part of.

The radius of curvature (r): The distance between the centre of curvature and the spherical mirror. This radius will intersect the mirror at the pole (P).

Principal Axis: The line passing through the pole and the centre of curvature is the main or principal axis.

Concave Mirror: A spherical mirror with the reflecting surface that bulges inwards.

Convex Mirror: A spherical mirror with the reflecting surface that bulges outwards.

Focus (F): Take a concave mirror. All rays parallel to the principal axis converge at a point between the pole and the centre of curvature. This point is called as the focal point or focus.

Focal length: Distance between pole and focus.

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Answer 2

Answer:

Explanation:

There’re few basic and important terms one needs to know while studying spherical mirrors inside the chapter “Reflection and Refraction”:

a. Center of Curvature (c)

b. Radius of Curvature (r)

c. Pole (p)

d. Principal axis

e. Aperture

f. Principal Focus or Focal Length

g. Focus

a. Center of Curvature (c) :

The Center of Curvature of a spherical mirror is the point in the centre of the mirror which passes through the curve of the mirror and has the same tangent and curvature at that point. It is denoted by the letter ‘c’.

b. Radius of Curvature (r):

It’s the linear distance between Pole and the Center of curvature.

c. Pole (p) :

It’s the midpoint of the spherical mirror.

d. Principal axis:

It’s an imaginary line passing through the optical centre and the centre of curvature of any lens or a spherical mirror.

e. Aperture:

An aperture of a mirror or lens is a point from which the reflection of light actually happens. It also gives the size of the mirror.

f. Principal Focus :

Principal Focus can also be called as Focal Point. It’s on the axis of a mirror or lens wherein rays of light parallel to the axis converge or appear to converge after reflection or refraction. Principal Focus is also what determines the Focal Length of the mirror.

g. Focus:

It’s any given point, where light rays parallel to the principal axis, will converge after getting reflected from the mirror.