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The energy of a photon of wavelength 400...

The energy of a photon of wavelength 4000 Å is
(use `h=6.66xx10^(-34)`J-s)

A

`2xx10^(-19)` J

B

`3xx10^(-19) `J

C

`4xx10^(-19) `J

D

`5xx10^(-19) `J

Text Solution

Verified by Experts

The correct Answer is:
D
`E=hv=(hc)/(lambda)`
`=(6.66xx10^(-34)xx3xx10^(8))/(4xx10^(-7))=5xx10^(-19)`J
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Knowledge Check

  • The energy of X-ray photon of wavelength 1.65 Å is (h=6.6 xx 10^(-34)J-sec,c=3xx10^(8)ms^(-1),1eV=1.6xx10^(-19)J)

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    D
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