Question

An object is placed at 30cm in front of concave lens of focal length 10cm. At what distance from the

lens image is formed ?​

Answer 1

Answer:

7.5 cm in front of the lens...

Answer 2

object is  7.5 CM on the side opposite to that of the object.

Explanation:

• In case of a convex lens the  focus of the convex mirror is negative with respect to the object. hence by following the sign convention in case of optics we find the equation,

• I/v=- 1/u -1/f = -(1/30+1/10) = -2/15 = (this is because the object lies in the negative x-axis.)

• Or v=  -7.5cm

• This means that the object is  7.5 CM on the side opposite to that of the object.

To know more,

obtain lens formula for spherical lens​ - Brainly.in

https://brainly.in/question/15025193