Question

How is image distance of concave len is 15cm

Answer 1

Answer:

13

Explanation:

Thus the object should be placed at a distance of 30 cm on the left side of the concave lens. ... Linear magnification, m=vu=-10-30=13

Answer 2

Answer:

30cm

Explanation:

object distance, u=?,

image distance, v=-10cm,

magnification of lens, m=?

.As 1f=1v-1u,1u=1v-1f=1-10+115=-130=-30cm.

Thus the object should be placed at a distance of 30 cm on the left side of the concave lens.

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