chapter 3 pre-lecture homework – Flashcards
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Which of the following does NOT demonstrate the wave nature of light?
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The corpuscular theory
The corpuscular theory, proposed by Isaac Newton, is the original name for what was later known as the particle theory.
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What fraction of the entire electromagnetic spectrum is spanned by visible light?
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Visible light covers a tiny fraction of the electromagnetic spectrum.
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A 6000 K star would appear as what color?
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yellow
According to Wien's law, stars that emit most of their energy near yellow wavelengths (like our Sun) have temperatures near 6000 K.
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Which of the following is true for electromagnetic waves?
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They are created by moving charged particles.
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The shape of a blackbody curve depends on what single property of the blackbody?
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temperature
It is completely determined by the temperature.
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Electromagnetic (EM) radiation penetrates the atmosphere of Earth at what portions of the electromagnetic spectrum?
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In visible, some IR, and some radio wavelengths
These are the principal wavelengths of EM radiation that can penetrate the atmosphere.
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As they are heated from low to high temperature, solid objects will appear to glow in which of the following sequences of colors?
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Red, reddish-yellow, then white
The solid object doesn't just change color; it will get much brighter and much whiter as radiation from all visible wavelengths adds to what we see.
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What would be the frequency of a photon with a wavelength of 100 m?
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3,000,000/second
This would be a frequency of 3 MHz, in the radio frequency portion of the electromagnetic spectrum.
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The number of waves that pass a point each second measures which of the following?
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frequency
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Which of the following is true regarding the speed of light?
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It is constant for all electromagnetic waves traveling in a vacuum.
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Which of the following colors has a wavelength shorter than the others?
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violet
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Which of the following types of electromagnetic waves has the shortest wavelength?
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x-ray
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Wien's law states that the wavelength of the peak radiation emitted by a blackbody is ________ the temperature of a blackbody.
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inversely proportional to
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Stefan's law states that the total energy radiated by a blackbody depends on the ________ power of the temperature of the blackbody.
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fourth
