Challenging Physics Quiz on Doppler Effect and Relativistic Momentum
Explore thought-provoking questions related to the Doppler Effect, electromagnetic waves, reference frames, and relativistic momentum and energy in Physics. Test your knowledge on topics like light wavelengths, train signals, and more. Get ready for a stimulating quiz experience!
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Presentation Transcript
Quiz_12 Doppler Effect for E&M Waves, Reference Frames New material Relativistic Momentum and Energy Physics 274 9/21/2016
Q.1 Given: Wavelength of red light is 650 nm and green light is 510 nm. Suppose when you drove toward an intersection, the traffic light has just turned red. How fast do you have to drive to claim that you saw a green light ? (c = speed of light) c-u c+u A. c. B. 0.12c C. 0.24c D. 0.36c f = f0 c+u c-u f = f0
Q.2 A super fast train is travelling at 0.6c relative to the station toward the positive x-direction. The train has a proper length of 600 m. At the moment the front of the train reaches the station sign (event 1), the driver sends a light signal to the back of the train. Event 2 is when the light reaches the back of the train. Set up the coordinate system such that event 1 in the train s reference frame is (x =0, t =0). Describe event 2 in the train s frame of reference. Given: Speed of light = 3x108 m/s. A. (x = - 600 m, t =0) B. (x = -600 m, t =2 s) C. (x = -480 m, t =2 s) D. (x = -750m, t =2 s)
