You’ve all probably seen this picture, or one like it, before. Now let’s make sense of it.
Practice 13.3.1
An electromagnetic wave with an electric field that oscillates with a period of 8.43 ps is travelling in a vacuum. What is the wavelength of this electromagnetic wave?
Check your answer: B. 2.53 mm
Practice 13.3.2
An electromagnetic wave with a frequency of 4.72 x 1014 Hz has a speed of 1.71 x 108 m/s when it travels through a medium. What is the index of refraction of that medium?
Check your answer: D. 1.75
Practice 13.3.3
An electromagnetic wave with a frequency of 4.72 x 1014 Hz has a speed of 1.71 x 108 m/s when it travels through a medium. What is the wavelength of this electromagnetic wave when it is in the medium?
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