I was having a little trouble understanding a concept in my book. My book asked the following question:(adsbygoogle = window.adsbygoogle || []).push({});

The frequency of electromagnetic wave A is twice that of electromagnetic wave B. For these two waves, which is the ratio wavelength_{A}/wavelength_{B}of the wavelengths in a a vacuum?

The answer turned out to be that the ratio would equal 1/2 because both waves have the same speed. I was able to calculate the 1/2 in my ratio, but I didn't understand how both waves would have the same velocity. I know frequency * wavelenth = velocity. If frequency is twice as large in one wave, how can they have the same speed?

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# The Speed of Light

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