When 0.50 Å X-ray strike a material , th...

When `0.50` Å X-ray strike a material , the photoelectron from the `K` shell are observed to move in a circle of radius `2.3 nm` in a magnetic field of `2 xx 10^(-2)` tesle acting perpendicular to direct of emission of photoelectron . What is the binding elergy of `k-shell` electron?

3.5 keV

6.2 keV

2.9 keV

5.5 keV

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