Question

Fill in the following blanks with suitable words (a) The reciprocal of the focal length in metres gives you the..........of the lens, which is measured in..........
(b) For converging lenses, the power is..........while for diverging lenses, the power is.........

Answer 1

Explanation:

( a ) power ,dioptre

( b) positive, negative

PLEASE MARK THIS AS BRAINIEST

Answer 2

a) Power & dioptres

b) Positive & negative

Explanation:

• The reciprocal of the focal length in metres gives you the power of the lens, which is measured in dioptres.
• For converging lenses, the power is positive while for diverging lenses, the power is negative.  
• The focal length (f) of an optical system is a measure of how strongly the system converges or diverges light. It is the inverse of the system's optical power.
• A positive focal length indicates that a system converges light, while a negative focal length indicates that the system diverges light. The distance between the centre of a lens or curved mirror and its focus.