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AE Physics Course
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The constant of the Wien law is 2.898 × 10^−3 m⋅K. The peak wavelength of the blackbody radiation emitted by the human body when the skin temperature is 37°C is:
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While standing outdoors one evening, you are exposed to the following four types of electromagnetic radiation: yellow light from a sodium street lamp, radio waves from an AM radio station, radio waves from an FM radio station, and microwaves from an antenna of a communications system. Rank these types of waves in terms of photon energy from highest to lowest.
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In a certain experiment, a filament in an evacuated lightbulb carries a current I1 and you measure the spectrum of light emitted by the filament, which behaves as a black body at temperature T1. The wavelength emitted with highest intensity (symbolized by λmax) has the value λ1. You then increase the potential difference across the filament by a factor of 8, and the current increases by a factor of 2. After this change, what is the new value of the temperature of the filament?
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A sodium surface is illuminated with light having a wavelength of 300 nm. The work function for sodium metal is 2.46 eV. The maximum kinetic energy of the ejected photoelectrons is:
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The work function for zinc is 4.31 eV. If photons of energy 5.50 eV are incident on zinc, what is the maximum kinetic energy of the ejected photoelectrons?
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An electron and a proton, moving in opposite directions, are accelerated from rest through the same potential difference. Which particle has the longer wavelength?
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The temperature of an electric heating element is 150°C. At what wavelength does the radiation emitted from the heating element reach its peak? The constant of the Wien law is 2.898 × 10^−3 m⋅K.
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Which of the following phenomena most clearly demonstrates the particle nature of light?
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In a Compton scattering experiment, a photon of energy E is scattered from an electron at rest. Afterthe scattering event occurs, which of the followingstatements is true?
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What is the de Broglie wavelength of an electron accelerated from rest through a potential difference of 50.0 V?
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