Electrons in Atoms C = fl.

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Presentation transcript:

Electrons in Atoms C = fl

If all electromagnetic waves travel at the speed of light, how do we get different wavelengths of color? What does the speed of light depend on? 3.00 x 108 m/s

c = fl Definition Where do we find it? Units c Speed of light On reference material m/s f Frequency We calculate it s-1 or Hz l Wavelength m

Practice with c = fl Some diamonds appear yellow because they contain nitrogen compounds that absorb purple light of frequency 7.23 x 1014 Hz. Calculate the wavelength of the absorbed light. c = f = = Formula:

Practice with c = fl One photon of UV light has a wavelength of 1.0 x10-8 m. What is its frequency? c = f = = Formula:

Practice with c = fl The laser in a compact disc (CD) player uses light with a wavelength of 7.80 x 10-7 m. What is the frequency of this light? c = f = = Formula: