Glencoe Physics: Principles and Problems, Student Edition
Author: Paul W. Zitzewitz
The inability of classical theory to explain the frequency distribution of a blackbody was called the ultraviolet catastrophe. Why is this name appropriate?
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What is the longest wavelength that light can have if it is to be capable of ionizing the hydrogen atom in its ground state?
Determine the power intensity of radiation per unit wavelength emitted at a wavelength of 500.0 nm by a blackbody at a temperature of 10,000 K.
Suppose an electron in a hydrogen atom makes a transition from the (n+1) th orbit to the nth orbit. Is the wavelength of the emitted photon longer for larger values of n, or for smaller values of n?
Does changing the intensity of a monochromatic light beam affect the momentum of the individual photons in the beam? Does such a change affect the net momentum of the beam?
For the blackbody radiation, classical theory predictsa. The radiation decreases at large wavelengthsb. The radiation decreases at small wavelengthsc. The radiation increases as the temperature decreasesd. The radiation has a maximum at a specific wavelength
If the temperature of a blackbody increases, the peak wavelength will increase as well. True or False
Einstein's interpretation of the photoelectric effect included which of the following? The high energy wave was able to excite the metal. A photon could carry sufficient energy to knock off an electron. Light was acting as a particle with quantized energy. a I only b II only c II and III only d I, II, and III only
No photoelectrons are emitted from tungsten unless the wavelength of incoming light is less than 270 nm. If an experiment requires electrons with a maximum kinetic energy of 2.0 eV, what frequency of light should be used to illuminate the tungsten?
An atom (not a hydrogen atom) absorbs a photon whose associated frequency is 6.2 * 1014 Hz. By what amount does the energy of the atom increase?
Calculate the temperature of a blackbody if the spectral distribution peaks at (a) gamma rays, λ = 1.50 x 10-14 m; (b) x rays, 1.50 nm; (c) red light, 640 nm; (d) broadcast television waves, λ = 1.00 m; and (e) AM radio waves, λ = 204m.
Which of the following statements about a black body are true? Select one or more: a.The spectrum of the cosmic background radiation corresponds with great accuracy to the radiation of a black body at a temperature of 2.7 K. b.A black body absorbs all the radiation that hits it, and emits no radiation at all. c.According to Planck's radiation law (black body distribution), the wavelength corresponding to the maximum energy density of the radiation decreases (and the frequency increases) as the temperature increases. d.A black body reflects all the radiation that hits it, and absorbs no radiation at all.
Use E = h ν and Planck’s constant to calculate theamount of energy in each quantum of the followingfrequencies. Don’t forget to substitute s-1 for Hz. Long waves: 3.40 X 105 Hz
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