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Calculate the energies of the photons as...

Calculate the energies of the photons associated with the following radiation`:`
violet light of 413 nm

Text Solution

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Wavelength of violet light `lambda_(v) = 413nm`
`= 413 xx 10^(-9) m`
`E _(r ) = ( hc)/( lambda_(v)) = ( 6.626 xx 10^(-34) xx 3 xx 10^(8))/( 413 xx 10^(-9))`
`= ( 19.878 xx 10^(-26))/( 413 xx 10^(-9)) = 0.0 481 xx 10^(-17) J` [To convert from J into ev]
`= ( 0.0481 xx 10^(-17))/( 1.6 xx 10^(-19)) = 0.03 xx 10^(2) = 3eV`.
`E _( r ) = 3 eV`.
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