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azatkgz
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And also check this one.
A physics professor on the Earth gives an exam to her students.who are in the spacecraft traveling at a speed v relarive to the Earth.The moment the craft passes the professor,she signals to start of the exam.She wishes her students to have time interval T_0( spacecraft time)to complete the exam.Find the time interval T(Earth time) she should wait before sending a light signal telling them to stop.
When in spacecraft T_0 for professor
T'=\frac{T_0}{\sqrt{1-\frac{v^2}{c^2}}}
T=T'-\frac{vT'}{c}=T_0\sqrt{\frac{1-v/c}{1+v/c}}
Homework Statement
A physics professor on the Earth gives an exam to her students.who are in the spacecraft traveling at a speed v relarive to the Earth.The moment the craft passes the professor,she signals to start of the exam.She wishes her students to have time interval T_0( spacecraft time)to complete the exam.Find the time interval T(Earth time) she should wait before sending a light signal telling them to stop.
The Attempt at a Solution
When in spacecraft T_0 for professor
T'=\frac{T_0}{\sqrt{1-\frac{v^2}{c^2}}}
T=T'-\frac{vT'}{c}=T_0\sqrt{\frac{1-v/c}{1+v/c}}
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