Assume an observer is at rest at the origin. if the coordinates of an event in t

Question

Assume an observer is at rest at the origin. if the coordinates of an event in that frame are (ct,x,y,z) = (1500,0,0,1500) m, at what time did/ will he first see the light from that event?

a) t = -5msec
b) t = -5?sec
c) t = 10msec
d) t = 10?sec
e) t = 5?sec

Assume an observer is at rest at the origin and t=0. if the coordinates of an event in that frame are (ct,x,y,z) = (1500,0,0,-1500) m, where does the event appear in the observer's space-time diagram?
(note:z=-1500)

a) future
b) past
c) future light cone
d) past light cone
e) causally disconnected

Assume an observer is at rest at the origin. if the coordinates of an event in that frame are (ct, x, y, z) = (1500,0,0,1500) m, at what time did/ will he first see the light from that event? a) t = -5msec b) t = -5?sec c) t = 10msec d) t = 10?sec e) t = 5?sec Assume an observer is at rest at the origin and t=0. if the coordinates of an event in that frame are (ct, x, y, z) = (1500,0,0,-1500) m, where does the event appear in the observer's space-time diagram? (note: z=-1500) future past future light cone past light cone causally disconnected

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