Unit: Waves
Year: 1995 Question#: 43
Question: In a vacuum, a monchromatic beam of light has a frequency of 6.3 x 1014 hertz. What color is the light?
(1 ) red
(2 ) yellow
(3 ) green
(4 ) blue
What is this question really asking?
Explanation by: Dan M
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Answer 1
red
INCORRECT
Try using the formula
to find the wavelength then use the reference table to find the color.
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Answer 2
yellow
INCORRECT
Try using the formula
to find the wavelength then use the reference table to find the color.
return to top Answer 3
green
INCORRECT
Try using the formula
to find the wavelength then use the reference table to find the color.
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blue
CORRECT
3.0 x 108m/s = 6.3 x 1014Hz (
) 
=the blue range
return to top What's this question really asking?
What is the wavelength of the light and what color is that ? return to top
