Cathode Ray Tube Question

  • #1
Aleena753
7
0

Homework Statement



What 3 materials is the cathode coated with, from which the electron originate?

Homework Equations


None

The Attempt at a Solution


From what I managed to find, I think some may be nickel and barium but I'm not sure.
 

Answers and Replies

  • #2
Simon Bridge
Science Advisor
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