Question

A person suffering from my
wear corrective lens of po
suffering from myopia (near-sightedness) was advised to
orrective lens of power – 25 D. A spherical lone
the laboratory. At what distance should a
focal length was taken in the laboratory. At what distan
from this lens so that it forms an image at
student place an object from this lens so that it forms
a distance of 10 cm from the lens ?​

Answer 1

write by your own relevant answer please

Answer 2

$f=-0.04\ m=-4\ cm$

${o}=-\frac{20}{7}\ cm$

Explanation:

Given:

• distance of image from the lens, $i=10\ cm$

• power of the lens, $P=-25\ D$

Now the focus of the lens:

$P=\frac{1}{f}$

where:

f = focal length

$-25=\frac{1}{f}$

$f=-0.04\ m=-4\ cm$

From the equation of lens:

$\frac{1}{f}=\frac{1}{i}+\frac{1}{o}$

where:

o = distance of the object

$-\frac{1}{4}=\frac{1}{10}+\frac{1}{o}$

${o}=-\frac{20}{7}\ cm$ i.e. negative sign means that the image formed is on the same side as that of the object.

#learnmore

TOPIC: concave lens

https://brainly.in/question/8774065