Question

an illuminated slit is kept at a distance of 40 cm in front of a convex lens of focal length 15 cm find the position of the screen to obtain the image .​

Answer 1

Answer:

Explanation:

1/v=1/v-1/u

1/15=1/v+1/40

1/v=1/15-1/40

  =25/600

v=24cm

therefore the position of the screen should be 24cm

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