A
appleseed
Guest
Two questions:<br />1) If an interiorly mirrored and vacuous sphere were created with a light source (the shutter of which would also be mirrored and would lie flush with the rest of the interior of the sphere) when the shutter closed, would the light continue to bounce around within the vacuum within the sphere for a very long time (light travels thousands of years in space). <br /><br />2) Imagine a light source pulsing steadily--on for two seconds and off for two seconds. One observer is travelling towards the light source at 3/4 the speed of light. The other observer is travelling at 3/4 the speed of light away from the source of light. How will the pulsing light appear to the two observers? In general terms, how long with the bursts of light last to each observer? How long will the darkness last between the bursts?