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## Physics 2080; Chapter 30, 31, 32 Notes

by: Amanda Biddlecome

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# Physics 2080; Chapter 30, 31, 32 Notes Physics 2080

Marketplace > Clemson University > Physics 2 > Physics 2080 > Physics 2080 Chapter 30 31 32 Notes
Amanda Biddlecome
Clemson
GPA 4.0

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These notes cover mostly chapter 30 notes.
COURSE
General Physics 2
PROF.
Dr. Pope
TYPE
Class Notes
PAGES
2
WORDS
KARMA
25 ?

## Popular in Physics 2

This 2 page Class Notes was uploaded by Amanda Biddlecome on Thursday April 21, 2016. The Class Notes belongs to Physics 2080 at Clemson University taught by Dr. Pope in Fall 2016. Since its upload, it has received 11 views. For similar materials see General Physics 2 in Physics 2 at Clemson University.

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Date Created: 04/21/16
Physics  2080   Chapter  30,  31,  32   April  19,  2016   Amanda  Biddlecome     1)  Blackbody  Radiation     -­‐blackbodies  in  a  furnace  give  off  electromagnetic  radiation     -­‐light  going  into  blackbodies  is  absorbed     -­‐Wien’s  Displacement  Law:  f peak =(5.88X10 s K )T  10 -­‐1 -­‐1   -­‐blackbody  radiation  is  quantized  depending  on  frequency     E =nhf   *n=0,1,2,3…;  energy  level   *f=frequency   *h=Planck’s  Constant:  EITHER  (6.63X10 Js)  OR  (4.14X10 eVs)  ­‐34 -­‐15     -­‐Einstein  discovered  that  light  (photons)  was  quanta  of  light       E=hf   *energy  of  quanta  of  light     2)  Photoelectric  Effect     -­‐more  intense  beams  of  light  contain  more  photons  but  each  photons  energy     remains  the  same     -­‐occurs  when  beam  of  light  strikes  metal  and  electrons  are  ejected  and     produce  an  electric  current     -­‐work  function=minimum  amount  of  energy  required  to  eject  electrons  from     a  metal       K max =E-­‐W o *K max =maximum  kinetic  energy  of  electron   *E=energy   *W =wook  function       -­‐more  intensity=more  electrons  of  same  energy     -­‐cutoff  frequency=frequency  required  to  eject  electrons     3)  Photons     -­‐they  travel  at  the  speed  of  light  and  have  zero  rest  mass  energy     p=(hf/c)=(h/wavelength)   *p=momentum       -­‐momentum  increases  with  increasing  energy     -­‐Compton  Effect=change  in  wavelength  of  scattered  photon  because  it  strikes     a  stationary  electron       Δλ=λ -­‐λ=h/m c(1-­‐cosθ)  e     -­‐wave-­‐particle  duality=de  Broglie       *waves  and  particles  can  act  like  each  other     λ=h/p   *λ=de  Broglie’s  wavelength   *h=Planck’s  constant   *p=momentum     4)  Heisenberg  Uncertainty  Principle     -­‐you  can  either  measure  the  momentum  or  the  position  accurately,  not  both     -­‐generally  not  noticed  in  macroscopic  situations

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