Question

With the help of a suitable diagram, explain the meaning of the following terms
for a concave mirror.
(a) centre of curvature
(b) pole
c) principal axis
(d) focus​
with diagram please jaldi

Answer 1

Answer:

• In geometry, the center of curvature of a curve is found at a point that is at a distance from the curve equal to the radius of curvature lying on the normal vector. It is the point at infinity if the curvature is zero. The osculating circle to the curve is centered at the centre of curvature.

• Pole: It is the center of the reflecting surface of the concave mirror also called vertex of mirror, generally denoted by letter 'P'.
• the line passing through the optical centre and centres of curvature of the faces of a lens or a curved mirror. 2. ( General Physics) any of three mutually perpendicular axes about which the moment of inertia of a body is maximum.
• A principal focus or focal point is a special focus: For a lens, or a spherical or parabolic mirror, it is a point onto which collimated light parallel to the axis is focused. ... The focus of a hyperbolic mirror is either of two points which have the property that light from one is reflected as if it came from the other.

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