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The wavelength of a photon is 1.4 Å. It ...

The wavelength of a photon is 1.4 Å. It collides with an electron. The energy of the scattered electron is `4.26xx10^(-16)` J. Find the wavelength of photon after collision.

Text Solution

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Given h=`6.63xx10^(-34)` Js
Initial wavelength of photon `lambda_1`
Final wavelength of photon `lambda_2`
`4.26xx10^(-16)="hc"/lambda_1="hc"/lambda_2`
`"hc"/lambda_2="hc"/lambda_1-4.26xx10^(-16)`
`(6.63xx10^(-34)xx3xx10^8)/lambda_2=14.21xx10^(-16)-4.26xx10^(-16)`
`lambda_2=2xx10^(-10) ` m =2.0 Å.
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