Briefly describe the difference between the amplitude of a wave (such as a light wave) and the frequency of light (again, such as a light wave).

a wave has a trough (lowest point) and a crest (highest point). The vertical distance between the tip of a crest and the wave’s central axis is known as its amplitude. This is the property associated with the brightness, or intensity, of the wave. The horizontal distance between two consecutive troughs or crests is known as the wavelength of the wave. Keep in mind that some waves (including electromagnetic waves) also oscillate in space, and therefore they are oscillating at a given position as time passes. The quantity known as the wave’s frequency refers to the number of full wavelengths that pass by a given point in space every second; the SI unit for frequency is Hertz (\text{Hz})(Hz)left parenthesis, start text, H, z, end text, right parenthesis, which is equivalent to “per seconds” \Big((left parenthesiswritten as \dfrac{1}{\text{s}}  s

start fraction, 1, divided by, start text, s, end text, end fraction or \text{s}^{-1}\Big)s  

−1

)start text, s, end text, start superscript, minus, 1, end superscript, right parenthesis. As you might imagine, wavelength and frequency are inversely proportional: that is, the shorter the wavelength, the higher the frequency, and vice versa. This relationship is given by the following equation:

c=\lambda \nuc=λνc, equals, lambda, \nu

where \lambdaλlambda (the Greek lambda) is the wavelength (in meters, \text{m}mstart text, m, end text) and \nuν\nu (the Greek nu) is the frequency (in Hertz, \text{Hz}Hzstart text, H, z, end text). Their product is the constant ccc, the speed of light, which is equal to 3.00\times10^8 \text{ m/s}3.00×10  

8

 m/s3, point, 00, times, 10, start superscript, 8, end superscript, start text, space, m, slash, s, end text. This relationship reflects an important fact: all electromagnetic radiation, regardless of wavelength or frequency, travels at the speed of light.

Explanation:

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