Transcript Announcements 4/4/12 Prayer Exam 3 ends Friday night

Announcements 4/4/12
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Prayer
Exam 3 ends Friday night
Done with liquid helium experiments… regular
office hours resume
Speed Bump
Announcement from Dr. Hart
Reading Quiz
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Who theoretically derived the correct blackbody
radiation formula (energy emitted at various
frequencies)
a. Curie & Weiss
b. Plank
c. Rayleigh & Jeans
d. Sommerfeldt
e. Stefan & Boltzmann
Reading Quiz
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What critical assumption did Plank make to
produce the correct formula?
a. continuous energy
b. quantized energy
c. long wavelength limit
d. short wavelength limit
Reading Quiz
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Whose law says that the amount of emitted
blackbody radiation is proportional to T4?
a. Curie & Weiss
b. Plank
c. Rayleigh & Jeans
d. Sommerfeldt
e. Stefan & Boltzmann
Energy of all photons with freq. f
Waves in a “box”
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Stefan-Boltzmann law
Plank radiation law