PHYS133 Chapter Notes - Chapter 5: Microwave Oven, London Academy Of Music And Dramatic Art, Sodium-Vapor Lamp
3 Mar 2016
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Other forms of em waves: radio: am or fm, microwave oven, radar. Wavelength: the distance between the adjacent crests (or troughs) Amplitude: half the difference in height between a crest and a trough (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) the leaf) each second. It is measuring is units of hertz (hz), which are cycles per second. (cid:1) (cid:1) Frequency: the number of crests that pass through a point (such as. All light which we see with our eyes is composed of electromagnetic radiation. But the wavelength lamda is different, depending on the color. Convenient unit for visible light lamda = nanometer = 1e^-9 meter. Ed light: lamda = (about) 700 nm. Yellow light (sodium lamp): lamda = 589 nm. Violent light: lamda = (about) = 400. Visible light has many colors, each with its own wavelength (cid:1) (cid:1) Wavelength x frequency = speed of light = constant in a vacuum = Wavelength = 1 cm, frequency = 30 ghz.
