Unit Test — Unit test Answers
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The chart shows the speed at which light travels through different media.
A
waterB
airC
glassD
diamond22
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The diagram shows a spectrometer being used to analyze a sample of a solution.
A
WB
XC
YD
Z23
What is the approximate wavelength of a light whose second-order dark band forms a diffraction angle of 15.0° when it passes through a diffraction grating that has 250.0 lines per mm?
A
26 nmB
32 nmC
414 nmD
518 nm24
As the frequency of electromagnetic waves increases, what happens to the wavelength?
A
It increases.B
It decreases.C
It fluctuates.D
It remains constant.25
An ultraviolet wave traveling through a vacuum has a wavelength of 4.0 × 10–7 m. The wave’s frequency, written in scientific notation to two significant figures, is × 1014 Hz.
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