Asked by Bren

Electrons are emitted from a conductor when the conductor is:

A. Exposed to weak light
B. cooled rapidly
c.bombarded by high-speed electrons
d.subjected to a small voltage

Answers

Answered by drwls
c. Photomultiplier tube light detectors use this principle.
See
http://quarknet.fnal.gov/projects/pmt/student/dynodes.shtml
for a discussion

The process is called secondary emission.
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