hw5_p5405_f07

# hw5_p5405_f07 - with the gravitational shift. 3)There are 3...

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HW 5 Phys5405 f07 due 10/11/07 1) JDJ chapter 11 problem 22 2) A photon of frequency f leaves the surface of a star of mass M and radius R. a)When the photon is very far from the star, it has a diﬀerent frequency f’. Show that | Δ f f | = GM Rc 2 and calculate the sign of Δ f . You can assume | Δ f f | << 1 in the use of potential energy in your derivation. b)calculate Δ f f for the sun and the earth. You can use R s = 6 . 965 × 10 8 , R e = 6 . 378 × 10 6 m and M s = 1 . 986 × 10 30 , M e = 5 . 974 × 10 24 kg for the radii and masses. c) The period of rotation of the sun is 24.7 d. What is the Doppler shift for 500 nm light emitted from the edge of the sun’s disk at the equator? Compare the magnitude of this shift
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Unformatted text preview: with the gravitational shift. 3)There are 3 charges at rest in O. According to an observer in O, Q 1 is at L e x , Q 3 is at L e z and Q 2 is at the origin. a) calculate the 3-vector force on each charge in O. b) use the Lorentz transform for the forces and get the 3-vector force on each charge in O (O moves relative to O with velocity V e z ). c) Calculate the magnetic force F M ( i ) on each charge in O d) Do the same for the electric force on each charge in O e) Figure out from this information how E x is related to E x and how E z is related to E z 1...
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## This note was uploaded on 12/24/2011 for the course PHYS 5406 taught by Professor Blecher during the Spring '10 term at Virginia Tech.

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