lecture20 101104

# lecture20 101104 - Tube Closed at One End Resonance in an...

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Tube Closed at One End Resonance in an Air Column Closed at One End square6 The closed end must be a node square6 The open end is an antinode square6 There are no even multiples of the fundamental harmonic 1 ƒ 1, 3, 5, 4 n v f n n n L = = = K Speed of Sound in Air square6 331 m/s is the speed of sound at 0° C square6 T is the absolute temperature 331 273 m T v s K = Quick Quiz #000 In the speed of sound lab, what was in resonance? A. Water and air B. Sound waves going in 1 direction C. Tuning fork and air in room D. Tuning fork and air in column Quick Quiz #00 In the speed of light lab, what was the actual wavelength of the microwaves? Note: f = 2450 MHz A. 12 cm B. 6 cm C. 7 cm D. 9 cm E. 8 cm Quick Quiz #0 In the speed of light lab, the distance between melted marshmellows was equal to: A. λ of the EM wave B. λ/2 of the EM wave C. 3λ/4 of the EM wave D. λ/4 of the EM wave

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Exam Quiz #1 The energy of a photon with wavelength = 300 nm is: a.1.6 x 10 -19 Joules b.6.6 x 10 -19 Joules c.1.6 x 10 -34 Joules d.6.6 x 10 -34 Joules Exam Quiz #2 In the photo-electric effect: A.Light of any wavelength may produce an electron if the light beam is intense enough B. The wavelength of the light must be short enough to over come the metal’s work function to produce an electron C.The wavelength of the light must be long enough to over come the metal’s work function to produce an electron Exam Quiz #3 A. H. Compton’s middle name is: A.Homer B. Harold C.Holly D.Herman E.Henry Exam Quiz #4 The important feature of the Compton Effect is that: A.Photons collide with electrons like billiard balls
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