Questions and Answers
The spectrum of colors seen on a soap bubble is a result of __________.
interference
In coherent waves, all wave crests and troughs __________.
reach the same point at the same time
Of the following, which is the best explanation for why the area at the top of the loop in the figure below is black?
The constructive interference that is happening is for wavelengths out of the visible spectrum.
Destructive interference in waves occurs when __________.
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Thin film constructive interference occurs when the wavelength of a wave is in multiples of __________.
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Why did Young place a single slit between the light source and the double slit?
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Light results in a spectrum through a prism and interference on a thin film. This demonstrates that light behaves as __________.
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Bright bands in interference fringes result from __________.
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In a double slit experiment with slits 1.0×10^-5 m apart, light casts the first bright band 3.0×10^-2 m from the center of a screen 0.65 m away. What is the wavelength of this light?
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The distance between the slits in a double-slit setup compared to the distance to the screen from the slits is __________.
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An argon ion laser with a wavelength of 476.5 nm is used as the light source in a double slit experiment. If the slits are 0.0190 mm apart and the screen is 0.800 m away, what is the separation between the central bright line and the first-order bright line?
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How, if at all, would the figure below be different if orange light of the same intensity had been used with the same apparatus?
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According to the Rayleigh criterion, two stars can be resolved if the __________.
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Why are larger telescope lenses important?
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What is the wavelength of light traveling through a diffraction grating on a spectrometer with 714 nm between lines and an angle of 54.0°?
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In the figure below, if light of wavelength 475 nm were shone through a slit of width 0.20 mm at a screen 0.60 m away, what would be the width of the central band?
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In the equation analyzing a diffraction grating, d is __________.
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Green light, which has a longer wavelength than yellow light, will have __________ in a single slit diffraction experiment than yellow light, when the same slit is used for both experiments.
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A diffraction grating on a spectrometer has 9.500×10^3 lines/cm. If light of a wavelength 432 nm is viewed through the spectrometer, what is the angle at which the light has a first order band?
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How, if at all, would the figure below be different if violet light of the same intensity had been used with the same apparatus?
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Why are the edges of shadows often fuzzy?
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Reflection and transmission gratings produce __________ interference patterns that are analyzed in __________.
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If white light passes through a grating spectroscope, you will see __________.
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A hologram is produced as a result of __________.
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Monochromatic light passing through a single slit will produce a diffraction pattern __________ a double slit.
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If light passes through a 0.050 mm slit and is projected on a screen 0.70 m away with 8.0 mm between the central bright band and the first dark band, what is the wavelength of the light?
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What causes the rainbow of colors you see on a CD?
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Study Notes
Concepts of Wave Interference
- The spectrum of colors on a soap bubble is produced by interference.
- Coherent waves have wave crests and troughs reaching the same point simultaneously.
- Bright bands in interference fringes arise from constructive interference, while the black area in certain contexts results from constructive interference for wavelengths outside the visible spectrum.
Types of Interference
- Destructive interference occurs when a crest overlaps with a trough.
- Constructive interference for thin films happens when the wavelength is in multiples of 1/4 wavelength.
Young's Double Slit Experiment
- A single slit is used to ensure light waves are coherent prior to passing through double slits.
- In a double slit setup with slits 1.0×10^-5 m apart, the first bright band can be predicted based on the distance from the center and the screen's distance.
Light Behavior and Wavelengths
- Light forms a spectrum through prisms and interference patterns in thin films, demonstrating its wave nature.
- Argon ion lasers (e.g., 476.5 nm wavelength) can be employed in double slit experiments to calculate separation between bright lines.
Rayleigh Criterion and Telescopes
- Two stars are resolvable if the central bright band of one falls on the dark band of the other, guided by the Rayleigh criterion.
- Larger telescope lenses enhance resolving power, allowing finer details to be observed.
Wavelength Calculations
- The wavelength of light can be calculated through a diffraction grating, using information such as line spacing and diffraction angle.
- Different wavelengths result in varying distances between patterns; for example, green light separates more than yellow light in single slit diffraction.
Diffraction and Interference Patterns
- Diffraction gratings produce similar interference patterns whether they are transmission or reflection types.
- Holograms are created through the phenomenon of interference.
Observational Effects
- Shadows appear fuzzy due to light diffraction around edges, causing blurriness at the limits of the shadow.
- White light through a grating spectroscope yields a spectrum series due to the different wavelengths interacting.
Practical Applications
- The rainbow effect seen on a CD arises from diffraction, illustrating the practical implications of wave behavior in everyday items.
Studying That Suits You
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Test your knowledge of key concepts from Chapter 19 of Physics, covering topics such as interference and wave behavior. This online test includes flashcards that will help reinforce your understanding of essential principles. Perfect for students looking to prepare for exams or review material.
