Electromagnetic radiation having a $15.0\mu \text{m}$ wavelength is classified as infrared radiation. What is its frequency?

Video Transcript

This is College Physics Answers with Shaun Dychko. The wave equation says that the speed of light equals frequency times wavelength and we can solve for f by dividing both sides by Lambda. And so we take the speed of light and divide it by the wavelength of this infrared wavelength. And so that's 3 times 10 to the 8 meters per second divided by 15 micrometers, which is times 10 to the minus 6 meters giving a frequency of 2.00 times 10 to the 13 Hertz.