In the electron-wave model of the atom, an electron in the second energy level contains
A) a single wavelength.
B) two wavelengths.
C) any number of wavelengths.
D) none of the above
Question 2
Betelgeuse is a star in the constellation Orion. It radiates heat at the rate of 3.00 1030 W and has a surface temperature of 3000 K.
Assuming that it is a perfect emitter, what is the radius of Betelgeuse? The Stefan-Boltzmann constant is 5.67 x 10-8 W/(m2K4).
A) 7.80 1010 m
B) 8.70 1010 m
C) 1.40 1011 m
D) 1.90 1011 m
E) 2.30 1011 m
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