![]() A unit in a denominator is indicated by a −1 power-s −1-and read as “per second.” Note how the m units cancel, leaving s in the denominator. ![]() We divide both sides of the equation by 5.55 × 10 −7 m and get ν = 5. We use the equation that relates the wavelength and frequency of light with its speed. What is the frequency of light if its wavelength is 5.55 × 10 −7 m? Figure 8.1 "Characteristics of Light Waves" shows how these two characteristics are defined. Wavelength has units of length (meters, centimeters, etc.), while frequency has units of per second, written as s −1 and sometimes called a hertz (Hz). Wavelength is typically represented by λ, the lowercase Greek letter lambda, while frequency is represented by ν, the lowercase Greek letter nu (although it looks like a Roman “vee,” it is actually the Greek equivalent of the letter “en”). of light is the number of cycles of light that pass a given point in one second. of light is the distance between corresponding points in two adjacent light cycles, and the frequency The number of cycles of light that pass a given point in one second. The wavelength The distance between corresponding points in two adjacent light cycles. As such, it can be described as having a frequency and a wavelength. We know from experiments that light acts as a wave. What we know as light is more properly called electromagnetic radiation. Describe light as a particle of energy.Describe light with its frequency and wavelength.
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