observation table of focal length of a concave mirror with name of objects and focal length.
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Answer:
Before getting started with the experiment, it is important to understand a few terms that are used in a concave mirror and convex lens:
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.