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Answer» Characteristics of a wave - Wavelength (\(\lambda\)). It is the distance between any two consecutive crests or troughs. It is expressed in Å, m, cm, pm or nm,. (1 Å = 10-10m or 10-8 cm,1 nm = 10-9 m, 1 pm = 10-12m).
- Frequency (\(\upsilon\)). It is equal to number of waves passing through a point in one second. Units are hertz or s-1 (1Hz = 1s-1).
- Velocity (c). It is the distance travelled by the wave in one second Relationship between c, \(\upsilon\,and \, \lambda\,:\,c=\,\upsilon\,\times\, \lambda \)
- Amplitude (a). It is the height of the crest or depth of the trough.
- Wave number (\(\bar \upsilon\)). It is equal to reciprocal of wavelength\(\left(\bar \upsilon=\frac{1}{\lambda}\right)\)
- Electromagnetic spectrum. It is the arrangement of electromagnetic radiations in order of increasing wavelengths .
Cosmic rays <γ-rays<X-rays<UV<visible<IR<Microwaves<Radiowaves
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