# physical science

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The speed of light is 3 „e 108 m/s (300,000,000 m/s). Red light has a wavelength of 7 „e 10-7 m (0.0000007 m). What is its frequency?

• physical science -

d = VT = V(1/f) = V/f = Wavelength,
f=V/d = 3*10^8 / 7*10^-7=0.4286*10^15 =
4.286*10^14 Hz.

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