A narrow beam of 60 keV electrons passes through a thin silver polycrystalline foil as shown in the figure. The interatomic spacing of silver crystals is 0.408 nm. Calculate the radius of the first-order diffraction pattern from the principal Bragg planes on a screen placed 40 cm behind the foil.
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![A narrow beam of 60 keV electrons passes through a thin silver polycrystalline foil
as shown in the figure. The interatomic spacing of silver crystals is 0.408 nm.
Calculate the radius of the first-order diffraction pattern from the principal Bragg
planes on a screen placed 40 cm behind the foil.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7b44cbd4-4153-42ed-9e4e-a7360eb11af6%2Fe4cc6d81-809a-427f-83bc-785359292346%2F1w8d7sk_processed.jpeg&w=3840&q=75)
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