[填空题]
a. In a thought experit,sf49 5hgqf5stc-h j ment, a spacecraft recedes away from the Earth atfzq c4gx)oaja-j :0+g a constant speed of 0.92c in the reference frame of Earth. The length of the spacecrajx+qgga40 o)zj-c:faft is measured as 35m by an observer in the spacecraft.
i. State the differences between Galilean and Special relativity with regards to the speed of light and time.
ii. Calculate the length of the spacecraft measured by an observer on Earth. $m$
b. After some time, the spacecraft encounters a rocket that moves at a speed of 0.75c relative to Earth in the opposite direction.
i. Calculate, relative to the spacecraft, the speed of the rocket according to the Galilean transformation is around times the speed of light.
ii. Calculate, relative to the spacecraft, the speed of the rocket according to the Lorentz transformation. v = % the speed of light.
iii. According to postulates of special relativity, outline which of your calculations in (b)(i) and (b)(ii) related to the speed of the rocket relative to the spacecraft is valid.
