Question

At what distance should an object be placed from a convex lens of focal length 18cm to obtain an image at 36cm from it ?what will be the magnification produced in this case.

Answer 1

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Answer 2

Brainly.in

zdenkahorvathova150

Secondary SchoolScience 13+7 pts

At what distance should an object be placed from a convex lens of focal length 18 cm to obtain an image at 24 cm from it on the other side.what will be the magnification produced in this case?

Report by Aniamgailiang5088 03.02.2018

Answers

Nikhil123458

Nikhil123458 Helping Hand

Therefore the OBJECT IS behind the mirror...and it's magnification is -1/3

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soniyasonu162

Soniyasonu162 Ambitious

HEY MATE HERE, IS UR ANSWER:-

GIVEN:-

Focal lenght of the convex lens= 18cm

Image distance from the convex lens= 24cm

By using lens formula,

1/f= 1/v - 1/u

1/u= 1/v - 1/f

1/u= 1/24 - 1/18

=3-4/72

1/u = -1/72

u= -72cm

The object distance from the convex lens is -72 cm

Object should be kept at a distance of 72cm on the left side of the convex lens

Magnification (m) = v/u

=24/ -72

=-1/3

Therefore the magnification= -1/3.

The image formed in the convex lens is inverted, real and diminished.

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