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Answer : 4. "The number of wavelengths per unit length."
What is called wave number?
5Q:
What is called wave number?
- 1Energy Wavesfalse
- 2Number of neutron raysfalse
- 3Number of electron raysfalse
- 4The number of wavelengths per unit length.true
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Answer : 4. "The number of wavelengths per unit length."
Explanation :
A wave number, or wavenumber, refers to the spatial frequency of a wave at a specific unit distance. Wave number is measured either in cycles per unit distance or in radians per unit distance, depending on the context. A wave number is related to but distinct from frequency, which is temporal in nature.