An excited atom decays to its ground state and emits a photon of green light. If instead the decay is to an intermediate state, then the light emitted could be

A) red.
B) violet.
C) blue.
D) any of the above
E) none of the above

Answer: A

Physics & Space Science

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Choose the true statement that compares and contrasts the Maxwell-Boltzmann (MB) distribution, the Fermi-Dirac (FD) distribution, and the Bose-Einstein (BE) distributions

a. The MB, FD, and BE statistical factors agree only at low particle energies. b. The MB distribution models only low-density material, while both the FD and BE distributions can model higher density material. c. The MB statistical factor goes to infinity at low particle energies, while the FD statistical factor goes to 1/2 and the BE statistical factor goes to 1. d. The MB and FD distributions work only for distinguishable particles while the BE distribution works for indistinguishable particles. e. The MB distribution works for particles with integer spin, the FD distribution works for particles with half-integer spin, and the BE distribution works for particles with any value of spin.

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Physics & Space Science

The arrangement of permitted orbits is ____

a. the same for each neutron b. unique for each electron c. the same for all elements d. the same for all molecules e. unique for each element

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Physics & Space Science

When an electron collides with a positron producing a pair of high gamma rays, we call this process

A) pair production B) matter obliteration C) photodisintegration D) annihilation

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Physics & Space Science

A 4.0-mF capacitor initially charged to 50 V and a 6.0-mF capacitor charged to 30 V are connected to each other with the positive plate of each connected to the negative plate of the other. What is the final charge on the 6.0-mF capacitor?

a. 20 mC b. 8.0 mC c. 10 mC d. 12 mC e. 230 mC

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Physics & Space Science