Question

an object is placed at a distance of 15cm from a convex lens. and inverted image is formed which is twice as large as the object. what is the distance of the image from the lens? where is the image formed​

Answer 1

Answer:

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Explanation:

30 cm

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Answer 2

Answer:

Given: For convex lens u=−15cm  f=10cm

To find: v

Solution: From lens formula

1v−u1=f1

v1+151=101

v1=301

v=30cm

And magnification is =−1530=−2

So for image is inverted and magnified and when a mirror is placed at a distance d behind lens then u for mirror is u1=−30+α

=α−30

and v=−30−14+α

From mirror formula

v1+u1=f1

α−451+α−301=10−1

(α−

Explanation:

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