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An object of 30 cm is placed in front of convex lens of focal length 20 cm find its position |
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Answer» ⬇⬇⬇⬇⬇⬇⬇⬇⬇⬇⬇⬇⬇⬇⬇⬇⬇⬇⬇⬇⬇⬇⬇QUESTION :An object of 30 cm is placed in front of convex lens of FOCAL length 20 cm find its positionSOLUTION :Given that, Object distance (u) = - 30 cm. Focal length (f) = 20 cm. IMAGE distance (v) = ? By USING " Lens Formula .. ⟹ 1/f = 1/v - 1/u➡ 1/20 = 1/v - 1/(-30) ➡ 1/v = 1/20 - 1/30➡ 1/v = 30 - 20/600➡ 1/v = 10/600➡ v = 600/10➡ v = 60 Therefore, it's image distance is 60 cm. ➢ Magnification (m) = -v/u➡ m = - 60/30➡ m = -2Hence, the image distance is 60 cm. ⬆⬆⬆⬆⬆⬆⬆⬆⬆⬆⬆⬆⬆⬆⬆⬆⬆⬆⬆⬆⬆⬆⬆Explanation:℘ℓḙᾰṧḙ ՊᾰԻк Պḙ ᾰṧ ♭Իᾰ!ℵℓ!ḙṧт ✌✌✌ |
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