Assume electrons are accelerated through a potential difference ...

[darbym82]

Assume electrons are accelerated through a potential difference of 25 000 V inside a TV picture tube. What is the minimum wavelength that could be produced when the electrons strike the phosphor? (1  = 10-10 m)
 a. 0.50
  b. 1.0
  c. 10
  d. 100
  e. 0.25

Question 2

How much energy is in an 89.7 MHz photon of FM-radiation?
 a. 2.2  10-33 J
  b. 9.5  10-27 J
  c. 7.4  10-42 J
  d. 5.9  10-26 J
  e. 3.7  10-25 J

[mochi09]

Answer to Question 1

A

Answer to Question 2

D

[darbym82]

Thanks

[mochi09]

Welcome