Chapter 14 Flashcards
(22 cards)
According to the quantum theory,
blackbodies emit electromagnetic radiation as blackbody radiation, according to the blackbody curve.
According to quantum physics, a blackbody
absorbs all incident wavelengths of radiation.
re-emits all incident wavelengths of radiation.
Which of the following is not a correct unit for Planck’s constant?
kg*m^2/s^3
The particle theory of light can be used to explain
the Compton effect and the photoelectric effect.
The wavelength of a matter wave can be increased by
decreasing the speed of the matter.
The concept that particles exhibit wave properties was proposed by
de Broglie.
Quantum mechanics provides a model of the atom that is
primarily mathematical.
Davisson and Germer experimentally demonstrated that
electrons can exhibit wave properties.
The maximum change in wavelength during Compton scattering occurs when
the photon scatters at an angle of 180.
Davisson, Germer, and Thomson conducted experiments that
provided evidence for de Broglie matter waves.
The Compton effect was observable because Compton bombarded free electrons with
X-ray photons.
A student selects a blue laser to shine on a photoelectric cell, but notices that the beam does not produce a photoelectric current. The student decides to select another laser to produce the photoelectric current. This time, she selects a laser that emits
an ultraviolet beam
True
photoelectrons are emitted only when the frequency of light incident on the metal is greater than some specific value.
NOT INTENSITY
Electron microscope technology is possible because
electrons exhibit wave properties and can be focused.
According to Heisenberg, if the uncertainty in the position of a moving particle decreases,
the uncertainty in the particle’s momentum increases.
According to Heisenberg’s uncertainty principle, it is impossible to determine both the position and the momentum of a particle at the same time because
measuring the position results in a change in momentum.
According to quantum indeterminacy, an antinode produced in a double-slit experiment
indicates the probable location where a particle will interact with a screen.
A pitcher throws his fastest fastball. The catcher is able to catch the ball because the wavelength of the ball is
so short that it does not diffract around the catcher’s mitt.
Heisenberg suggested that as the uncertainty in the position of a moving particle increases,
the particle’s momentum is more easily determined.
Heisenberg suggested that it is
impossible to accurately measure the position and momentum of a particle at the same time.
Physicists studied collisions between photons and subatomic particles and determined that photon energy changes as a result of a collision. In order to arrive at this conclusion, the physicists made direct measurements of changes in the photons’
wavelength.
The momentum of a photon and the frequency of light
are directly related.
