write the experimental procedure to find the image distance using concave mirror when an object is kept in front it on principal axis at different locations
Answers
Answer:Centre of curvature: For a curved mirror, the centre of curvature, C can be defined as the centre of a hollow glass sphere of which a curved mirror is a part.
Radius of curvature: For a curved mirror, the radius of curvature, R can be defined as the radius of the hollow glass sphere of a spherical mirror is part.
Principal axis: Principal axis is defined as the imaginary line passing through the pole and centre of curvature of the spherical mirror.
Principal focus: Principal focus is defined as a point at which the reflected rays meet or appear to meet for the spherical mirror. For a concave mirror, the principal focus is in the front and for a convex mirror, the principal focus is at the behind.
Below is an experiment to determine the focal length of a concave mirror and convex lens.
Aim
To determine the focal length of:
Concave mirror
Convex lens by obtaining the image of a distant object.
Theory
How to find focal length of concave mirror?
Following are the ways to obtain the focal length of the concave mirror:
A concave mirror is defined as the spherical mirror whose reflecting surface is curved inwards and follows laws of reflection of light.
The light rays coming from a distant object can be considered to be parallel to each other.
If the image formed is real, inverted and very small in size, then the parallel rays of light meet the point in the front of the mirror.
The image formed by the convex lens is real and can be obtained on the screen.
f is used to denote the difference between the principal axis P and the focus F of the concave mirro
Explanation:
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