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Chapter 38: Q 12 (page 1114)
For what wavelength of light does a 100 mW laser deliver photons per second?
Wavelength of light is 497 nm.
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I The allowed energies of a simple atom are
a. Draw the atom's energy-level diagram. Label each level with the energy and the quantum number.
b. What wavelengths appear in the atom's emission spectrum?
c. What wavelengths appear in the atom's absorption spectrum?
What is the energy, in keV, of 75 keV x-ray photons that are backscattered (i.e., scattered directly back toward the source) by the electrons in a target?
II Ultraviolet light with a wavelength of} shines on a gas of hydrogen atoms in their ground states. Some of the atoms are ionized by the light. What is the kinetic energy of the electrons that are freed in this process?
At what speed is an electron's de Broglie wavelength (a) , (b) , (c) , and (d) ?
A 100 W incandescent lightbulb emits about 5 W of visible light. (The other 95 W are emitted as infrared radiation or lost as heat to the surroundings.) The average wavelength of the visible light is about 600 nm, so make the simplifying assumption that all the light has this wavelength. How many visible-light photons does the bulb emit per second?
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