Math, asked by kaif959, 9 months ago

A convex lens has focal length of 15 cm. At what distance Should the object from the lens be placed so that it forms an image at 10 cm from the
lens ? Also find the magnification produced by the lens. PLEASE GIVE ME RIGHT ANSWER​

Answers

Answered by ShírIey
73

AnswEr:

Given:

• F = 15

• v = - 10

To Find:

u = ?

Explanation:

= 1/f = 1/v - 1/u

= 1/u = 1/v - 1/f

Here,

f = 15 & v = -10

Now, Putting Values

= 1/u = - 1/-10 - 1/15

= 1/u = (-3 -2)/30

= 1/u = -5/30

= u = -6

____________________

Magnification:

= v/u = -10/-6

= 5/3

____________________

Answered by Saby123
11

</p><p>\tt{\red{Given \: - }}

F = 15 cm

V = 10 cm

 \dfrac{1}{u}  +  \dfrac{1}{v }  =  \dfrac{1}{f}  \\  \\  \frac{1}{v}  =  \frac{1}{10}  -  \frac{1}{15}  \\  \\ v =  - 6\: cm.

.

Magnification = -5/3.

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