a mirror is bathed by the evaporation of a gold electrode, inside a vacuum chamb passing an electric current. Gold atoms fly in all directions, and some of them stic the glass (or other gold atoms that are already on the glass plate). Suppose that e column of deposited atoms is independent of neighboring columns and that the average deposition rate isd layers per second. a) What is the probability of m atoms be deposited in one place after a while t? b) What fraction of the glass is not covered by any gold atom?

Elements Of Electromagnetics
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4. a mirror is bathed by the evaporation of a gold electrode, inside a vacuum chamber,
passing an electric current. Gold atoms fly in all directions, and some of them stick to
the glass (or other gold atoms that are already on the glass plate). Suppose that each
column of deposited atoms is independent of neighboring columns and that the
average deposition rate isd layers per second.
a) What is the probability of m atoms be deposited in one place after a while t?
b) What fraction of the glass is not covered by any gold atom?
c) What is the variance in thickness?
Transcribed Image Text:4. a mirror is bathed by the evaporation of a gold electrode, inside a vacuum chamber, passing an electric current. Gold atoms fly in all directions, and some of them stick to the glass (or other gold atoms that are already on the glass plate). Suppose that each column of deposited atoms is independent of neighboring columns and that the average deposition rate isd layers per second. a) What is the probability of m atoms be deposited in one place after a while t? b) What fraction of the glass is not covered by any gold atom? c) What is the variance in thickness?
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