Question 20 5 pts A 3.00-cm tall light bulb is placed at a distance of 50 cm from a thin convex lens having a focal length of

Question

Question 20
5 pts
A 3.00-cm tall light bulb is placed at a distance of 50 cm from a thin convex lens having a focal length of
13 cm. What is the image distance?

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Gia Bảo 2 weeks 2021-07-19T06:22:16+00:00 1 Answers 3 views 0

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    0
    2021-07-19T06:23:39+00:00

    Answer:

    The image distance is 17.56 cm

    Explanation:

    We have,

    Height of light bulb is 3 cm.

    The light bulb is placed at a distance of 50 cm. It means object distance is, u =-50 cm

    Focal length of the lens, f = +13 cm

    Let v is distance between image and the lens. Using lens formula :

    \dfrac{1}{f}=\dfrac{1}{v}-\dfrac{1}{u}\\\\\dfrac{1}{v}=\dfrac{1}{f}+\dfrac{1}{u}\\\\\dfrac{1}{v}=\dfrac{1}{13}+\dfrac{1}{(-50)}\\\\v=17.56\ cm

    So, the image distance is 17.56 cm.

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