Blue light is used to form a single-slit diffraction pattern...

Name: Problem 33, Chapter 19: Physics: A Conceptual World View
Uploaded: 2020-06-24T12:55:45-08:00
Duration: 58 s
Channel: Sanjeev Kumar
Description: Blue light is used to form a single-slit diffraction pattern on a screen. As the slit is made wider, does the separation of the bright bands on the screen decrease, increase, or remain the same? Explain.

Blue light is used to form a single-slit diffraction pattern on a screen. As the slit is made wider, does the separation of the bright bands on the screen decrease, increase, or remain the same? Explain.

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Key Concepts

Angular Dispersion and Slit Width Relationship

The angular positions of the minima in a single-slit diffraction pattern are determined by the equation sin? = m?/a, where m is an integer representing the order of the minimum, ? is the wavelength, and a is the slit width. As the slit width increases, the angles at which these minima occur become smaller, leading to a decrease in the separation between the bright bands on the screen.

Diffraction

Diffraction is the process by which waves bend around obstacles or spread out as they pass through openings. This behavior leads to interference effects that produce characteristic patterns, especially when the wavelength of the wave is comparable to the size of the obstacle or aperture.

Single-Slit Diffraction

Single-slit diffraction occurs when coherent light passes through a narrow aperture, causing the light to spread out and interfere with itself. This interference produces a pattern of light and dark bands on a screen, where the positions of the bands are determined by the path differences of waves emanating from different parts of the slit.

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