Special relativity questions?
1.) a rocket is moving at 1/4 the speed of light relative to earth. at the center of this rocket, a light suddenly flashes. to an observer at rest on earth
a. the light will reach the front of the rocket after it reaches the back of the rocket.
b. the light will reach the front of the rocket at the same instant that it reaches the back of the rocket.
c. the light will reach the front of the rocket before it reaches the back of the rocket. 2.) a rocket is moving at 1/4 the speed of light relative to earth. at the center of this rocket, a light suddenly flashes. to an observer at rest in the rocket
a. the light will reach the front of the rocket before it reaches the back of the rocket.
b. the light will reach the front of the rocket at the same instant that it reaches the back of the rocket.
c. the light will reach the front of the rocket after it reaches the back of the rocket. 3.) an astronaut in an inertial reference frame measures a time interval δt between her heartbeats. what will observers in all other inertial reference frames measure for the time interval between her heartbeats?
a. δt
b. less than δt
c. more thanδt
d. the answer depends on whether they are moving toward her or away from her. 4.) you are a passenger on a spaceship. as the speed of the spaceship increases, you would observe that
a. the length of your spaceship is getting shorter.
b. the length of your spaceship is not changing.
c. the length of your spaceship is getting longer. 5.) a star is moving towards the earth with a speed at 90% the speed of light. it emits light, which moves away from the star at the speed of light. relative to us on earth, what is the speed of the light moving toward us from the star?
a. 0.90c
b. 1.9c
c. 1.20c
d. 1.1c e,) c