A body emits photons of frequency or. at equal rates in all directions in its rest frame.
1?. [C] Relativistic Beaming A body emits photons of frequency or. at equal rates in all directions in its rest frame. A detector at rest in this frame a large distance away {compared to the sire of the body) receives photons at a rate per unit solid angle tdfljdrdflidphotonsrts – sri] that is independent of direction. in an inertial frame tr’. .1". _v’. :’i in which an observer is at rest the body is moving with speed V along the .Tfrfllifi. ta} Derive t5.’l5i relating a photon’s direction of propagation in the rest frame to the direction of propagation in the observer’s frame. [Ill Find the rate at which photons are received per unit solid angle dNMt’dfl’ .- large distance away in the observer’s frame as a function of angle or” from the .r’—asis. te] Find the luminosity per unit solid angle rtL’Mfl’lergfls – srl] a large distant: away as a function of the angle L’t’r in the observer’s frame. {d} Discuss the heanting of number and energy in the observer’s frame as the veto..- lly ofthe source approaches the velocity of light.
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