Question: Which of the following options explains the process of 'sputtering' that occurs in Hollow Cathode Lamp?
Options
A : Positive ions collide with cathode surface and metal atoms from cathode are ejected
B : Negative ions collide with cathode surface and metal atoms from anode are ejected
C : Positive ions collide with negative ions and metal atoms from anode are ejected
D : Positive ions collide with negative ions and photons are ejected
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