This photo shows the visible light spectrum of the Sun. Why does it have all those dark lines on it?
A) The dark lines represent wavelengths of light at which atoms near the Sun's surface absorb radiation from the hotter solar interior.
B) The dark lines come from sunspots on the Sun, which are dark in color.
C) The dark lines are caused by Doppler shifts.
D) The dark lines are not real, but rather are artifacts of the photographic process used to record the spectrum.
A) The dark lines represent wavelengths of light at which atoms near the Sun's surface absorb radiation from the hotter solar interior.
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An electron in a hydrogen atom has orbital quantum number l = 7. How many possible values of the magnetic quantum number ml could it have?
A) 15 B) 98 C) 6 D) 7 E) 33
Which of these gases is most responsible for the greenhouse effect on Earth?
a. oxygen (O2) b. nitrogen (N2) c. carbon dioxide (CO2) d. ozone (O3) e. ammonia (NH3)
A motorcycle daredevil wants to ride up a 50.0 m ramp set at a 30.0° incline to the ground. It will launch him in the air and he wants to come down so he just misses the last of a number of 1.00 m diameter barrels. If the speed at the instant when he leaves the ramp is 60.0 m/s, how many barrels can be used?
a. 79 b. 318 c. 332 d. 355 e. 402
One of the emission lines described by the original version of Balmer's formula has wavelength 377nm. What is the value of n in Balmer's formula that gives this emission line?
A) 11 B) 12 C) 13 D) 14