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Q 61

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 993

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Short Answer

To determine the focal length of a lens, you place the lens in front of a small lightbulb and then adjust a viewing screen to get a sharply focused image. Varying the lens position produces the following data:

Use the best-fit line of an appropriate graph to determine the focal length of the lens.

Focal length is equal to 15 cm.

See the step by step solution

Step by Step Solution

Step 1. Given information is :The table indicating the bulb to lens distance versus lens to screen.

We need to determine the focal length of the lens using the best fit line of an appropriate graph.

Step 2. Using thin lens formula

Now, Finding and from given data :

Plotting the Graph :

y-intercept indicates the reciprocal of f.

Therefore,

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