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Please answer these in full detail, thank you! MC27: Name:_______________________________________​​Lab Section _____________ Answer each multiple choice...

Please answer these in full detail, thank you!



MC27: Name:_______________________________________Lab Section _____________

Answer each multiple choice question (part a) and then (part b) explain in words why your answer is correct:

1a) If an electron and a proton travel at the same speed, which has the shorter wavelength?

( ) electron ( ) proton

1b)

2a) The work functions for sodium and cesium are 2.28eV and 2.14eV, respectively. For incident photons of a given frequency, which metal will give a higher maximum kinetic energy for the electrons?

( ) sodium ( ) cesium

2b)

3a) If the wavelength of a photon is halved, by what factor does its energy change?

( ) 4 ( ) 2 ( ) ½ ( ) ¼

3b)

4a) A beam of red light and a beam of violet light each deliver the same power on a surface. For which beam is the number of photons hitting thesurface per second the greatest?

( ) the red beam ( ) the violet beam ( ) the number is the same for both beams

4b)

5a) When the accelerating voltage in an X-ray tube is doubled, the wavelength of the X-rays is

( ) increased to twice the original value ( ) is increased to four times the original value

( ) decreased to one-half the original value ( ) decreased to one-fourth its original value

5b)

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We will use concepts from photo electric effect and photon energy.

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