Question

Fill in the following blanks with suitable words :; (a) The reciprocal of the focal length in ____ gives you the power of the lens, which is measured in........; (b) For _____ lenses, the power is positive while for diverging lenses, the power is negative

Answer 1

Answer:

A) lens, metres

B) contact

Answer 2

Explanation:

(a) The reciprocal of the focal length in meter gives you the power of the lens, which is measured in dioptre.

(b) For conversing lenses, the power is positive while for diverging lenses, the power is negative

The distance between the lens and the image sensor when the subject is in focus is called the focal length of the lens. If the light rays converge on a single point than it is called a focal point of the converging lens.