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The wavelength of visible spectrum exten...

The wavelength of visible spectrum extends extends from violet (400 nm) tored (750 nm). Express the corresponding frequency ranges.

Text Solution

Verified by Experts

The correct Answer is:
`7.5xx10^(14) Hz "to" 4.0xx10^(14)Hz`
Frequency of violet radiation
`lambda=400nm=400xx10^(-9)m=4xx10^(-7)m , c=3xx10^(8)ms^(-1)`
`v=(c)/(lambda)=((3xx10^(8)ms^(-1)))/((4xx10^(-7)m))=7.5xx10^(14)s^(-1)`(Hz)
Frequency of red radiation
`lambda=750nm=750xx10^(-9)m=75xx10^(-8)m, c=3xx10^(8)ms^(-1)`
`v=(c)/(lambda)=((3xx10^(8)ms^(-1)))/((75xx10^(-8)m))=4.0xx10^(14)s^(-1)` (Hz)`
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Knowledge Check

  • The wavelength of the visible region of spectrum ranges from

    A
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    2000 A - 4000 A
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