Question 1
For the following allowed transitions, which photon would have the largest wavelength when an electron "jumps" from one energy level, characterized by the quantum number n, to another?
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n = 2 to n = 1
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n = 3 to n = 2
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n = 3 to n = 1
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n = 1 to n = 3
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n = 4 to n = 1
Question 2
Forbidden transitions and selection rules suggest that
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a photon has linear momentum.
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a photon has energy.
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a photon has angular momentum.
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a photon has parity.
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a photon has mass.