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Q. 27

Expert-verified
Found in: Page 956

### Physics for Scientists and Engineers: A Strategic Approach with Modern Physics

Book edition 4th
Author(s) Randall D. Knight
Pages 1240 pages
ISBN 9780133942651

# You want to photograph a circular diffraction pattern whose central maximum has a diameter of . You have a helium neon laser and a -diameter pinhole. How far behind the pinhole should you place the screen that’s to be photographed?

Distance for the screen to be photographed,

See the step by step solution

## Step1: Aperture Diffraction

When light passes through a narrow opening, such as an aperture with a low f-number, it causes lens diffraction, which is an optical interference.

When the wavelength of light and the size of the opening are about the same, lens diffraction occurs.

## Step2: Find the distance

In the aperture diffraction experiment, the center width is given by,

We can find by solving parametrically.

## Step3: Find the distance

This will be the length in our situation.