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When reviewing the properties of light Dr. Lavelle gave as the constant c as 3.00 x 10ˆ8 m/s. I understand that this constant will always be given and that it is part of a formula but I was quite confused as to which type of problem/when would we use this constant?
You will see this constant in the wave equations f=c/λ which relates wavelength and frequency. If given frequency of an electromagnetic wave and asked to find the wavelength, then you would use the speed of light constant.
The speed of light constant, c, will be provided to us as previously mentioned and can be used in a variety of problems. We recently have also begun to conduct calculations using E= h x v as well as En= (-h x R)/(n^2). These questions often give us energy levels that electrons transition from and require us to find wavelength. Since the equation c=wavelength x frequency is needed for wavelength, we would need to use c in these types of problems as well.