Two electrons are placed into separate (very tiny) one-dimensional boxes A and B. When the electrons are excited to higher energy levels and then decay to lower levels, they emit photons. The longest-wavelength spectral line from the electron in box A is observed to have the same wavelength as the third-longest spectral line from the electron in box B. The ratio of the box lengths LA/LB is equal to
A. 3/7
B. 7/3
C. 
D. 
E. 9/49
C.
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Indicate whether the statement is true or false
An auditorium has a volume of 6 × 103 m3. How many molecules of air are needed to fill the auditorium at one atmosphere and 0°C?
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