you may well know, placing metal objects inside a microwave oven can generate sparks. Two of your riends are arguing over the cause of the sparking, with one stating that the microwaves \"herd\" electrons into \"pointy\" areas of the metal object, from which the electrons jump from one part of the object to another. The other friend says that the sparks are caused by the photoelectric effect. In this problem, we will prove or disprove the latter idea using basic physics. Suppose the typical work function of the metal is roughly 3.890x10 J. Calculate the maximum wavelength in angstroms of the radiation that will eject electrons from the metal. Number Considering that microwave ovens radiate at 2.45 GHz, how would you respond to the debate? O O The sparks cannot be caused by the photoelectric effect. The sparks could be caused by the photoelectric effect.
Solution
Wavelength, lambda = hc/E
Lambda = (6.626 x 10 -34 x 3 x 10 8 )/ (3.89 x 10 -19 )
Wavelength, lambda = 5.11 x 10 -7 m = 5110 Angstrom.
Spark could be caused by photoelectric
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you may well know- placing metal objects inside a microwave oven can g.docx
1. you may well know, placing metal objects inside a microwave oven can generate sparks. Two of
your riends are arguing over the cause of the sparking, with one stating that the microwaves
"herd" electrons into "pointy" areas of the metal object, from which the electrons jump from
one part of the object to another. The other friend says that the sparks are caused by the
photoelectric effect. In this problem, we will prove or disprove the latter idea using basic
physics. Suppose the typical work function of the metal is roughly 3.890x10 J. Calculate the
maximum wavelength in angstroms of the radiation that will eject electrons from the metal.
Number Considering that microwave ovens radiate at 2.45 GHz, how would you respond to the
debate? O O The sparks cannot be caused by the photoelectric effect. The sparks could be caused
by the photoelectric effect.
Solution
Wavelength, lambda = hc/E
Lambda = (6.626 x 10 -34
x 3 x 10 8
)/ (3.89 x 10 -19
)
Wavelength, lambda = 5.11 x 10 -7 m = 5110 Angstrom.
Spark could be caused by photoelectric
