Physics, asked by chhavisharma1629, 9 months ago

249
REFRACTION OF LIGHT
44. An object 50 cm tall is placed on the principal axis of a convex lens. Its 20 cm tall image is formed on the
screen placed at a distance of 10 cm from the lens. Calculate the focal length of the lens.

Answers

Answered by hemanth101

∆∆∆∆∆∆∆∆√

h1 = 50 cm

h2 = -20 cm (real image)

v = 10 cm

m = v/u = h2/h1

10/u = -20/50

u = -25 cm

1/v – 1/u = 1/f

1/10 – 1/-25 = 1/f

f = 50/7 = 7.14 cm

Answered by manjitdas221

Answer:

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249REFRACTION OF LIGHT44. An object 50 cm tall is placed on the principal axis of a convex lens. Its 20 cm tall image is formed on thescreen placed at a distance of 10 cm from the lens. Calculate the focal length of the lens.​

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249
REFRACTION OF LIGHT
44. An object 50 cm tall is placed on the principal axis of a convex lens. Its 20 cm tall image is formed on the
screen placed at a distance of 10 cm from the lens. Calculate the focal length of the lens.