Which spectrum is shown above?
a. emission
b. absorption
c. blackbody
d. None of the other choices are correct.
C
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A light ray strikes the surface of sapphire (n = 1.77) at an angle of incidence of 
What angle of refraction results?
A. 
B. 
C. 
D. 
E. 
The primary reason that Mercury and the Moon lack atmospheres is because they are not volcanically active.
Answer the following statement true (T) or false (F)
Four resistors of 20 ?, 40 ?, 60 ?, and 80 ? are connected across a DC voltage source. If the current through this circuit is 0.5 A, what is the voltage applied to this circuit?
A) 20 V B) 40 V C) 60 V D) 80 V E) 100 V
An incandescent light (glowing tungsten filament) produces:
A) a continuous spectrum, with the peak giving the temperature of the filament. B) an emission spectrum, with bright lines due to ionized tungsten. C) an absorption spectrum, with dark lines due to the solid filament. D) a continuum, with bright tungsten lines added. E) a continuum, with dark lines of tungsten and argon as well.