Question

The power of a lens having focal length 1 cm is
(a) 1d
(B) 10 D
(C) 0.1 d
(d) 100d

Answer 1

Answer:

a) 1d

Explanation:

Power=1/f

=1/1

=1d

Answer 2

Given:

Lens's focal length measurement = 1 centimeter

To find:

Power of lens =?

Solution:

The lens's power is based on its capacity to bend the light that falls on it.

It is inversely related to the lens' focal measurement.

The lens's power is positive if it converges light and a negative value if it diverges light.

It is found in units called dioptres or inverse of meters.

The below given steps and formula is employed for determining the len's power:

=> Len's power = $\frac{1}{focal length}$ (formula used when value given in meters)

=> Lens's power = $\frac{100}{focal length}$ (formula used when value given in centimeters)  ∵ P = 1/focal length(cm)/ 100

=> Lens's power = $\frac{100}{1 cm}$

=> Lens's power = 100 Dioptre

Therefore right option response is (option d) 100 Diopter power.