When a spherical lens is held towards the sun and a sharp image is formed on a piece of black paper,a hole gets burnt in the black paper,after some time.
@Name the lens used in above activity.
(b)What name is given to the distance between the spherical lens and the black paper?
Give correct answer
Answers
Focal length is the term given to the distance between the spherical lens and the black paper . (3). Black paper is effective then white paper because black color absorbs heat more easily then white color and we can get the hole faster . Convex lens is a converging lens
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