How far from the lens must the film in a camera be, if the lens has a 35.0 mm focal length and is being used to photograph a flower 75.0 cm

Question

How far from the lens must the film in a camera be, if the lens has a 35.0 mm focal length and is being used to photograph a flower 75.0 cm away? Explicitly show how you follow the steps in the Problem–Solving Strategy for lenses.

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Hưng Khoa 4 years 2021-07-27T17:53:35+00:00 1 Answers 261 views 0

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    2021-07-27T17:55:14+00:00

    Answer:

    The film in a camera be is placed at a distance of 3.67 cm.

    Explanation:

    Given that,

    Focal length of the lens, f = +35 mm = +3.5 cm

    Object distance of the flower, u = -75 cm

    Using lens formula to find the distance from the lens must the film in a camera be. Using lens formula as :

    \dfrac{1}{v}-\dfrac{1}{u}=\dfrac{1}{f}\\\\\dfrac{1}{v}=\dfrac{1}{f}+\dfrac{1}{u}\\\\\dfrac{1}{v}=\dfrac{1}{(3.5)}+\dfrac{1}{(-75)}\\\\v=3.67\ cm

    So, the film in a camera be is placed at a distance of 3.67 cm.

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