Skip to ContentGo to accessibility pageKeyboard shortcuts menu
OpenStax Logo
Physics

Short Answer

PhysicsShort Answer

Short Answer

17.1 Understanding Diffraction and Interference

21 .
Light passing through double slits creates a diffraction pattern. How would the spacing of the bands in the pattern change if the slits were closer together?
  1. The bands would be closer together.
  2. The bands would spread farther apart.
  3. The bands would remain stationary.
  4. The bands would fade and eventually disappear.
22 .
A beam of light passes through a single slit to create a diffraction pattern. How will the spacing of the bands in the pattern change if the width of the slit is increased?
  1. The width of the spaces between the bands will remain the same.
  2. The width of the spaces between the bands will increase.
  3. The width of the spaces between the bands will decrease.
  4. The width of the spaces between the bands will first decrease and then increase.
23 .
What is the wavelength of light falling on double slits separated by 2.00 μ m if the third-order maximum is at an angle of 60.0 ?
  1. 667 nm
  2. 471 nm
  3. 333 nm
  4. 577 nm
24.

What is the longest wavelength of light passing through a single slit of width 1.20 μm for which there is a first-order minimum?

  1. 1.04 µm
  2. 0.849 µm
  3. 0.600 µm
  4. 2.40 µm

17.2 Applications of Diffraction, Interference, and Coherence

25 .
Describe a diffraction grating and the interference pattern it produces.
  1. A diffraction grating is a large collection of evenly spaced parallel lines that produces an interference pattern that is similar to but sharper and better dispersed than that of a double slit.
  2. A diffraction grating is a large collection of randomly spaced parallel lines that produces an interference pattern that is similar to but less sharp or well-dispersed as that of a double slit.
  3. A diffraction grating is a large collection of randomly spaced intersecting lines that produces an interference pattern that is similar to but sharper and better dispersed than that of a double slit.
  4. A diffraction grating is a large collection of evenly spaced intersecting lines that produces an interference pattern that is similar to but less sharp or well-dispersed as that of a double slit.
26.

Suppose pure-wavelength light falls on a diffraction grating. What happens to the interference pattern if the same light falls on a grating that has more lines per centimeter?

  1. The bands will spread farther from the central maximum.
  2. The bands will come closer to the central maximum.
  3. The bands will not spread farther from the first maximum.
  4. The bands will come closer to the first maximum.
27.

How many lines per centimeter are there on a diffraction grating that gives a first-order maximum for 473 nm blue light at an angle of 25.0°?

  1. 529,000 lines/cm
  2. 50,000 lines/cm
  3. 851 lines/cm
  4. 8,934 lines/cm
28.

What is the distance between lines on a diffraction grating that produces a second-order maximum for 760-nm red light at an angle of 60.0°?

  1. 2.28 × 104 nm
  2. 3.29 × 102 nm
  3. 2.53 × 101 nm
  4. 1.76 × 103 nm
Order a print copy

As an Amazon Associate we earn from qualifying purchases.

Citation/Attribution

This book may not be used in the training of large language models or otherwise be ingested into large language models or generative AI offerings without OpenStax's permission.

Want to cite, share, or modify this book? This book uses the Creative Commons Attribution License and you must attribute Texas Education Agency (TEA). The original material is available at: https://www.texasgateway.org/book/tea-physics . Changes were made to the original material, including updates to art, structure, and other content updates.

Attribution information
  • If you are redistributing all or part of this book in a print format, then you must include on every physical page the following attribution:
    Access for free at https://openstax.org/books/physics/pages/1-introduction
  • If you are redistributing all or part of this book in a digital format, then you must include on every digital page view the following attribution:
    Access for free at https://openstax.org/books/physics/pages/1-introduction
Citation information

© Jan 19, 2024 Texas Education Agency (TEA). The OpenStax name, OpenStax logo, OpenStax book covers, OpenStax CNX name, and OpenStax CNX logo are not subject to the Creative Commons license and may not be reproduced without the prior and express written consent of Rice University.