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A certain slide projector has a 100 $\mathrm{mm}$…

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Problem 40 Medium Difficulty

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

Answer

3.67 $\mathrm{cm}$

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Physics 103

College Physics for AP® Courses

Chapter 25

Geometric Optics

Related Topics

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Problem 13
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Problem 15
Problem 16
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Problem 18
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Problem 22
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Problem 24
Problem 25
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Problem 32
Problem 33
Problem 34
Problem 35
Problem 36
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Problem 48
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Problem 51
Problem 52
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Problem 54
Problem 55
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Problem 57
Problem 58
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Problem 61
Problem 62
Problem 63
Problem 64

Video Transcript

the camera has got a convex lens. So, um, this is a principal access. It will take light from an object and will focus here. So the side on which the lens focuses, Um, a light That side will be a past. You, in the hope of the site, will be an active, um, So using this convention for lens, then we could write Let's formula that is one of our focal length is equal to one over the, um, size off the image minus one or size off the object. Um, that position's already not the size. So position off the image minus one over position off the object. So we have here of the focal length for our camera is a 35 millimeters. And then, uh so this one I wrote the Q also So this should be a p. P. So this one is a P. Then I will bring this one here, and then this will end up, and where we pee is given for the flower issues. 750 on that is equal to one working. Then simplifying this expression we get a cure is equal. Thio 33.4 mm So, um, the flame will be placed at the distance off a 33.4 millimeter in a camera for the focal length over 35. End off the problem. Thank you for watching.

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Irina Lyublinskaya, Gregg Wolfe, Douglas Ingram , Liza Pujji

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