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An electron beam accelerated through 600...

An electron beam accelerated through 600 V is incident on a metallic foil. The distance between the arrays of atoms of the metal is `0.6overset@A`, the angle of diffraction for first maximum is

A

`sin^-1 0.4`

B

`sin^-1 0.6`

C

`sin^-1 0.8`

D

`sin^-1 1.0`.

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