NEET  >  Power of a Lens

# Power of a Lens Video Lecture - Physics Class 12 - NEET

## Physics Class 12

154 videos|444 docs|185 tests

## FAQs on Power of a Lens Video Lecture - Physics Class 12 - NEET

 1. What is the power of a lens?
Ans. The power of a lens is a measure of its ability to converge or diverge light. It is measured in diopters (D) and is defined as the reciprocal of the focal length of the lens in meters.
 2. How is the power of a lens calculated?
Ans. The power of a lens can be calculated using the formula: Power (P) = 1 / Focal Length (f). The focal length is measured in meters, and the power is expressed in diopters (D).
 3. What is the difference between a converging lens and a diverging lens in terms of power?
Ans. A converging lens has a positive power, which means it converges light rays to a focal point. On the other hand, a diverging lens has a negative power as it causes light rays to diverge or spread out.
 4. How does the power of a lens affect its ability to bend light?
Ans. The power of a lens determines the amount by which it bends light. A lens with a higher power will bend light more and have a shorter focal length, while a lens with a lower power will bend light less and have a longer focal length.
 5. Can the power of a lens be changed?
Ans. The power of a lens is determined by its shape and refractive index, which cannot be easily changed. However, the power of a lens system can be altered by combining multiple lenses or using additional optical elements to achieve the desired power.

## Physics Class 12

154 videos|444 docs|185 tests

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