kay4Njamadymorger kay4Njamadymorger

23-01-2017
Physics

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The ultraviolet light that causes suntans (and sunburns!) has a typical wavelength of 300 nm. what is the frequency of these rays?

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scme1702 scme1702

31-01-2017

Using the formula:
v = fλ, where v is the speed of the wave, f is its frequency and λ is its wavelength.
The speed of ultraviolet light is equal to that of light. Therefore:
f = v/λ
f = 3 x 10⁸ / 300 x 10⁻⁹
f = 1 x 10¹⁵ Herz

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