Green light has a wavelength of 5.4 × 10−7 m. What is the frequency of this EM-wave in air?

Name: Green light has a wavelength of 5.4 × 10−7 m. What is the frequency of this EM-wave in air?
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Question

Quizplus · Accepted Answer

We use the formula: 
frequency = speed of light / wavelength 
The speed of light in air is approximately 3.00 × 108 m/s. 
Therefore, frequency = (3.00 × 108 m/s) / (5.4 × 10−7 m) 
frequency = 5.56 × 1014 Hz (to three significant figures)

Green Light Has a Wavelength of 5