Question

a concave lens of focal lenght 15 cm forms an image 10 cm from the lens .how far is the object placed from the lens .? find the magnification produced by the lens .with the help of this mention the nature of the image​

Answer 1

Explanation:

so the object is placed 30 cm away from the concave lens

Answer 2

Answer:

Focal length (f ) = -15 cm

Distance of image (v) = -10 cm

1v–1u=1f

1/u = -(1/10) – (1/- 15)

1/u =1/15 – 1/10

1/u = -0.033

u = -30 cm

So, the object is placed 30 cm away from the concave lens.

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