What would be the frequency of the wave if it has wavelength of 100nm?
Speed of light = 3×108m/s
A
3×103Hz
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B
3×1013Hz
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C
3×108Hz
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D
3×1015Hz
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Solution
The correct option is D3×1015Hz <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->
Data given in the question:
Wavelength = 100nm =100×10−9m = 10−7m
Speed of light = 3×108m/s
The relation between frequency and wavelength of a wave is:
Frequency (v) × Wavelength (λ) = Speed of light(c) v = cλ=3×10810−7
= 3×1015Hz