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The wavelength range of the visible s...

The wavelength range of the visible spectrum extends from vloler (400nm) to red (750 nm) Express these wavelength in frequency (Hz )

Text Solution

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for ultravioler 400nm = 400 `xx 10^(9) m= lambda`
c= velocity of light in vacuum = 30.`xx10^(8) ms^(-1)`
`v=(c )/(lambda) = (3.00 xx 10^(8) ms^(-1))/(400 xx 10^(9) m)`
Wavelength `= lambda = 750 nm = 750 xx 10^(9) m`
and v= c= 30 `xx 10^(8) ms^(-1)`
`v=(c )/(lambda ) = (3.0xx 10^(8) ms^(-1))/( 750 xx 10^(9 ) m)`
The range of visible spectrum is from `40xx 10^(14)`
hz to 7.5 `xx 10^(14) Hz` in terms of frequecny units.
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