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Explain the following term related to spherical lenses: focal length
When a spherical mirror is held towards the sun and its sharp image is formed on a piece of a carbon paper for some time, a hole is burnt in the carbon paper.
What name is given to the distance between spherical mirror and carbon paper?
How is a spherical mirror used to diverge a beam of light from a point? Name the type of mirror used.
Complete the following diagrams in Figure by drawing the reflected rays for the incident rays 1 and 2.
Figure shows a concave mirror with its pole at P, focus F and centre of curvature C. Draw ray diagram to show the formation of image of an object OA.
Name the kind of mirror used to obtain:
A real and diminished image.
Define the following term in relation to concave mirror.
Focal length
Define the term Focus of a concave mirror.
