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Critical Frequency (fc)
The critical frequency (f c ) for a given layer is the highest frequency that will be returned down to Earth by that layer after having been beamed straight up at it. It is important to realise that there is such a maximum, and it is also necessary to know its value under a given set of ..
The critical frequency (f c ) for a given layer is the highest frequency that will be returned down to Earth by that layer after having been beamed straight up at it. It is important to realise that there is such a maximum, and it is also necessary to know its value under a given set of ..Summary (Contd…)
. The wavelengths absorbed appear as dark lines or bands on a bright background. According to Kirchhoff's law an element can absorb only those wavelengths from continuous light, which it emits at the same temperature. This law was used to study structure of the Sun when Fraunhoffer explained existe..
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