Physics Midterm Grade 12 Term 1 Flashcards
In a star’s spectrum, the frequency of the peak radiation emitted
increases as the temperature decreases.
Increases
Einstein theorized that the momentum of a photon is inversely
proportional to the wavelength.
True
The wavelength of a particle is inversely proportional to the
particle’s momentum.
True
Because of the Compton effect, when light of short wavelength is
used to measure the location of a particle, the particle’s position is
changed.
Momentum
The Heisenberg uncertainty principle says that it is impossible to
measure precisely both the position and momentum of a particle
at the same time.
True
Incandescent objects emit light because of the ____ of the
charged particles inside their atoms.
Vibrations
Einstein explained the ____ by postulating that light exists in
bundles of energy called ____ .
Photoelectric effect, photons
The photoelectric effect is the emission of electrons by certain
metals when they are exposed to ____ .
Electromagnetic Radiation
The work function is equivalent to the energy needed to free the
most weakly bound ____ .
Electron
Even though they have zero mass, photons have energy and ____ .
Momentum
Einstein’s theory of the photon reinterpreted and extended ____
theory of radiation from hot bodies.
Planck’s
