The spectra of most galaxies show redshifts. This means that their spectral lines
A) have wavelengths that are longer than normal.
B) always are in the red part of the visible spectrum.
C) have wavelengths that are shorter than normal.
D) have a higher intensity in the red part of the spectrum.
A) have wavelengths that are longer than normal.
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What is meant by neutrino oscillations?
a. oscillating movement of neutrinos b. one neutrino type (e.g., muon neutrinos) changing into another (e.g., tau neutrinos) c. random changes in mass of neutrinos d. none of the above
Silver has a Fermi level of 5.5 eV. At 0 K, what is the speed of the electrons with the Fermi speed?
A) 1.4 × 106 m/s B) 1100 m/s C) 2200 m/s D) 0 E) 1.1 × 106 m/s
The luminosity of a star is the total amount of energy it radiates each second
Indicate whether the statement is true or false
A white dwarf's atoms have their electron orbitals crushed as closely as the Exclusion Principle allows
Indicate whether the statement is true or false