1.

Which one of the following corresponds to a photon of highest energy?

Answer»

`lamda=300nm``v=3xx10^(8)s^(-1)`
`barv=30cm^(-1)`

SOLUTION :(a)`lamda=300nm=300xx10^(-9)m`
`E=(hc)/(lamda)=(6.626xx10^(-34)xx3xx10^(8))/(300xx10^(-9))`
`=6.626xx10^(-19)J`
(b) `v = 3 xx 10^(8) s^(-1)`
`E = hv = 6.626 xx 10^(-34) xx 3 xx 10^(8) = 1.9878 xx 10^(-25)` J
(c ) `barv=30cm^(-1)=30xx10^(2)m^(-1)`
`E=hcbarv=6.626xx10^(-34)xx3xx10^(8)xx30xx10^(2)`
`=5.9634xx10^(-22)J`
(d) `E=6.626xx10^(-27)J`


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