English, asked by srai52611, 5 months ago

plz give the answer fast

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Answered by Anonymous

12

Davisson and Germer designed and built a vacuum apparatus for the purpose of measuring the energies of electrons scattered from a metal surface. ... Electrons from a heated filament were accelerated by a voltage and allowed to strike the surface of nickel metal.

Answered by btsarmyforever90

2

Answer:

Angle DCM:Acute angle,

Angle DCN:Acute angle,

Angle DCB:Right angle.

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