What do you mean by power of a lens?

Open in App

Solution

The ability of a lens to converge or diverge the ray of light after refraction through it is called the power of the lens.
It is defined as the reciprocal of focal length.
$P o w e r = \frac{1}{F o c a l l e n g t h o f l e n s}$
3. SI unit of Power of lens is diopter $(D)$ .

Suggest Corrections

Similar questions

What do you mean by focal plane of a lens?

What do you understand by the term magnification ? Write expression for it for a lens, explaining the meaning of the symbols used.

(a) What do you understand by the power of a lens? Name one factor on which the power of a lens depends.

(b) What is the unit of power of a lens? Define the unit of power of a lens.

(c) A combination of lenses for a camera contains two converging lenses of focal lengths 20 cm and 40 cm and a diverging lens of focal length 50 cm. Find the power and focal length of the combination.

What do you mean by power of a lens?

What do you mean by the power of a lens? What is the power of a lens with a focal length $- 5 c m$ ?

Join BYJU'S Learning Program

What do you mean by power of a lens?

The ability of a lens to converge or diverge the ray of light after refraction through it is called the power of the lens. It is defined as the reciprocal of focal length. Power=1Focallengthoflens 3. SI unit of Power of lens is diopter (D).

The ability of a lens to converge or diverge the ray of light after refraction through it is called the power of the lens.
It is defined as the reciprocal of focal length.
$P o w e r = \frac{1}{F o c a l l e n g t h o f l e n s}$
3. SI unit of Power of lens is diopter $(D)$ .