When 24.8 k e V X-rays strike a material, the photoelectrons emitted from K shell are observed to move in a circle of radius 23 mm in a magnetic field of 2 × 10 - 2 T . The binding energy of K shell e

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When 24.8 k e V X-rays strike a material, the photoelectrons emitted from K shell are observed to move in a circle of radius 23 mm in a magnetic field of 2 × 10 - 2 T . The binding energy of K shell electrons is

TestHub · Accepted Answer

evB = mv 2 R ⇒ v = e m BR Kinetic energy of photoelectrons K = 1 2 mv 2 = e 2 B 2 R 2 2 m K = 2 .97 × 10 - 15 J = 18 .6 KeV K = E P - E K E K = E P - K = 24 .8 - 18 .6 = 6 .2 KeV

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