Projection effects can trick you into thinking that an astrophysical object is moving superluminally. Consider a...
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Projection effects can trick you into thinking that an astrophysical object is moving "superluminally". Consider a quasar that ejects gas with speed v at an angle 0 with respect to the line-of-sight of the observer. Projected onto the sky, the gas appears to travel perpendicular to the line of sight with angular speed Vapp/D, where D is the distance to the quasar and Vapp is the apparent speed. Derive an expression for vapp in terms of v and 0. Show that, for appropriate values of v and 0, vapp can be greater than 1. Projection effects can trick you into thinking that an astrophysical object is moving "superluminally". Consider a quasar that ejects gas with speed v at an angle 0 with respect to the line-of-sight of the observer. Projected onto the sky, the gas appears to travel perpendicular to the line of sight with angular speed Vapp/D, where D is the distance to the quasar and Vapp is the apparent speed. Derive an expression for vapp in terms of v and 0. Show that, for appropriate values of v and 0, vapp can be greater than 1.
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Date Page sol we con use polov coordinates here At time O gas at l ... View the full answer
Related Book For
Fundamentals of Physics
ISBN: 978-0471758013
8th Extended edition
Authors: Jearl Walker, Halliday Resnick
Posted Date:
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