63ent j s q ue s tio nho wc a ns o m e th ing b e b o

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Unformatted text preview: ABOUT PHOTONS? BB P HO T O NS We b e lie ve th e e ne rg y in a n E&M wa ve is c a rrie d b y p h o to ns Q ue s tio n: Wh a t a re P h o to ns ? Ans we r: P h o to ns a re “lig h t p a rtic le s ”. P h o to ns p o s s e s s b o th wa ve a nd p a rtic le p ro p e rtie s P a rtic le : Ene rg y a nd Mo m e ntum lo c a lize d Wa ve : T h e y h a ve d e finite fre q ue nc y & wa ve le ng th (fλ = c ) C o nne c tio ns s e e n in e q ua tio ns : Ene rg y = h f p = E/c = h /λ P la nc k’s c ns ta -34 h =o6.63ent J-s Q ue s tio n: Ho w c a n s o m e th ing b e b o th a p a rtic le a nd a wa ve ? Ans we r: It c a n’t (wh e n we o b s e rve it) Wh a t we s e e d e p e nd s o n h o w we c h o o s e to m e a s ure it ! T h e m ys te ry o f q ua ntum m e c h a nic s : Mo re o n th...
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This document was uploaded on 02/13/2014.

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