Physics, asked by nithin234, 11 months ago

doctor advised to use 2D lens what is the focal length of it
which lens he used

Answers

Answered by amitraja26

50 cm................

nithin234: which lens

amitraja26: focal length not a negative one

amitraja26: so lenses is convex

nithin234: if it is negative then

amitraja26: it's also called converging lens

amitraja26: then diverging lese

amitraja26: I. e concave

nithin234: convex- conveging lens.concave-?

nithin234: thanks

amitraja26: welcome

Answered by twinkle1125

Hello friend

Here's ur answer....

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Given that the power of lens P = 2D

We know that, P = 100 / f(cm)

2 = 100/f

2f = 100

f = 100/2 = 50 cm

The focal length of the lens = 50 cm

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Hope it helped u......☺️☺️

nithin234: which lens

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