Dispersing light that has traveled from a hot wire through a cool gas gives what type of spectrum?
a. Line absorption
b. Continuous
c. Line emission
d. Ultraviolet
a
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What did Einstein consider was the greatest blunder of his career?
A. Not predicting that the universe is expanding B. Not predicting the existence of photons C. Not predicting that light in glass or other transparent material will travel at less than "the speed of light in a vacuum
When Venus first formed it had large quantities of water vapor in its atmosphere while today only very low levels of water are present. Where did most of the water vapor go?
A) it was destroyed in the atmosphere by ultraviolet light from the Sun B) it became chemically incorporated into rocks in the crust C) it was blasted into space by impacts D) it escaped into space
A fancy sports car moves past an observer on a corner at a speed of 0.600c. When the observer indicates a one-second interval has passed, what time interval will be shown on the driver's watch?
A. 1.67 s B. 0.800 s C. 1.25 s D. 0.600 s E. 1.00 s
The red light from a HeNe laboratory laser results from a transition in Ne. Determine the wavelength of the light given off if the energy difference between states is 1.08 eV. (h = 6.63 × 10^?34 J?s, c = 3.00 × 10^8 m/s, 1 eV = 1.60 × 10^?19 J, and 1 nm = 10?9 m)
a. 383 nm b. 1840 nm c. 1150 nm d. 1340 nm e. 203 nm