Question

In Below Figure, the lens has focal length 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? (a) 30 cm (b) -30 cm (c) -20 cm (d) None of the above ​

Answer 1

Answer:

Very Hard i cant explain it but as per my knowledge it should be 30cm or -30 cm

Explanation:

Answer 2

Answer:

It Is -30

Explanation:

Done By Using Mirror Formula.

Given: f=−15

Given: f=−15 v=−10

Given: f=−15 v=−10From mirror formula,

Given: f=−15 v=−10From mirror formula, v1

Given: f=−15 v=−10From mirror formula, v1

Given: f=−15 v=−10From mirror formula, v1 =

Given: f=−15 v=−10From mirror formula, v1 = f

Given: f=−15 v=−10From mirror formula, v1 = f1

Given: f=−15 v=−10From mirror formula, v1 = f1

Given: f=−15 v=−10From mirror formula, v1 = f1

Given: f=−15 v=−10From mirror formula, v1 = f1

Given: f=−15 v=−10From mirror formula, v1 = f1 −10

Given: f=−15 v=−10From mirror formula, v1 = f1 −101

Given: f=−15 v=−10From mirror formula, v1 = f1 −101

Given: f=−15 v=−10From mirror formula, v1 = f1 −101 −

Given: f=−15 v=−10From mirror formula, v1 = f1 −101 − u

Given: f=−15 v=−10From mirror formula, v1 = f1 −101 − u1

Given: f=−15 v=−10From mirror formula, v1 = f1 −101 − u1

Given: f=−15 v=−10From mirror formula, v1 = f1 −101 − u1 =

Given: f=−15 v=−10From mirror formula, v1 = f1 −101 − u1 = −15

Given: f=−15 v=−10From mirror formula, v1 = f1 −101 − u1 = −151

Given: f=−15 v=−10From mirror formula, v1 = f1 −101 − u1 = −151

Given: f=−15 v=−10From mirror formula, v1 = f1 −101 − u1 = −151

Given: f=−15 v=−10From mirror formula, v1 = f1 −101 − u1 = −151

Given: f=−15 v=−10From mirror formula, v1 = f1 −101 − u1 = −151 u

Given: f=−15 v=−10From mirror formula, v1 = f1 −101 − u1 = −151 u1

Given: f=−15 v=−10From mirror formula, v1 = f1 −101 − u1 = −151 u1

Given: f=−15 v=−10From mirror formula, v1 = f1 −101 − u1 = −151 u1 =151

Given: f=−15 v=−10From mirror formula, v1 = f1 −101 − u1 = −151 u1 =151 −101

Given: f=−15 v=−10From mirror formula, v1 = f1 −101 − u1 = −151 u1 =151 −101

Given: f=−15 v=−10From mirror formula, v1 = f1 −101 − u1 = −151 u1 =151 −101

Given: f=−15 v=−10From mirror formula, v1 = f1 −101 − u1 = −151 u1 =151 −101 u=−30 cm