Question

A rocket ship of length L
(in the rocket's frame) leaves the earth at a speed (
4
5
)
c
. A light signal is sent after it which arrives at the rocket's tail at t
=
0
according to the rocket clock and the earth clock.
(a) When does the signal reach the head of the rocket according to the rocket's clock?
(b) According to the earth's clock?
(c) The answers to parts (
a
)
and (
b
)
are not related like proper and improper time intervals. Why?

Answer 1

Explanation:

according to the rocket clock and the earth clock