11 th question answer (a) question
Answers
Answer:
aapko diagram nikal ne ke hai
Explanation:
book may se dhek kar nikalo
Answer:
Explanation:
Center of curvature
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 ly...
The point that used to be the center of the ball is now called the center of curvature of the mirror. The point in the center of the mirror is called the vertex (or center) of the mirror, and the line joining the vertex and the center of curvature is called the axis of the mirror.
To calculate the degree of curve, just enter the known radius value and find the degree of curvature. Curvature of railroad tracks, measures the degree of curvature (i.e) by measuring the degrees between the two radii of a circle having the track as the arc length. The measure of curvature of a circular arc is known as the degree of curve.
It can also be defined as the spherical distance between the point at which all the rays, falling on the lens either seems to converge to it (in case of Convex Lens) or diverge from it (in case of Concave Lens) and the lens itself.
2.Answer.
(a) Centre of curvature is the centre of the sphere of which the spherical mirror is a part.
(b) Radius of curvature is the linear distance between the pole and the centre of curvature.
(c) Pole is the mid point of a spherical mirror.
(d) Principal axis is an imaginary line passing through the pole and the centre of curvature of a spherical mirror.
(e) Principal focus is a point on the principal axis, where a beam of light, parallel to the principal axis, after reflection, either actually meets (concave) or appears to meet (convex).
(f) Focal length is the linear distance between the pole and the principal axis
that's all