Chemistry/Physics PS test Time Travel based on Einstein’s theories
Einstein’s Theory of General Relativity predicted that space-time around earth would be not only warped, but it would also be twisted by the planet’s rotation.
→ Light doesn’t always travel at the speed of light. A new experiment reveals that focusing or manipulating the structure of light pulses reduces their speed, even in vacuum conditions.
→ The researchers produced pairs of photons and sent them on different paths toward a detector. One photon zipped straight through a fiber. The other photon went through a pair of devices that manipulated the structure of the light and then switched it back. Had structure not mattered, the two photons would have arrived at the same time. But that didn’t happen. Measurements revealed that the structured light consistently arrived several micrometers late per meter of distance traveled.
1. How many separate theories actually compose Albert Einstein’s Theory of Relativity?
2. The special relativity theory is based on the assumption of _____.
a. relative motion
b. relative space
c. constant time
d. constant energy
3. The theory of general relativity is different from special relativity, because it is based on what specifically?
4. In Einstein’s theory of general relativity, he proposed that gravity created a(n) ____ on the earth’s surface, instead of a ____.
a. pull; push
b. absence of force; pull
c. push; pull
d. absence of force; push
5. Standing still, the speed of light over a specific period of time is _____.
b. always changing
d. unable to be determined
6. Einstein’s theory of general relativity predicted that space-time around the earth would be warped by the planet’s rounded surface, as well as twisted by the planet’s ______.
d. none of the above
7. According to Einstein, what would happen to the time around you, in relation to everyone else standing on the earth, if you were to travel at the speed of light?
a. it would move more quickly
b. it would move more slowly
c. it would not change
d. unable to be determined
8. A new experiment showed that light may not always be as constant as originally thought. Light’s speed is seemingly reduced inside vacuum conditions when its ____ is altered or manipulated.
9. According to modern scientists, which of the following is true regarding the idea of time travel today?
a. Scientists have already completed successful time travel experiments.
b. The laws of physics do not allow for time travel.
c. The laws of physics allow for time travel but it is unlikely it will occur.
d. The only proven “direction” for time traveling would be going backwards in time.
10. Which of the following is the most accurate representation of the traditional time travel paradox?
a. going back in time and causing nothing to change.
b. going forward in time and visiting your future grandchildren.
c. going back in time and accidentally causing the death of your great-grandfather.
d. the time travel paradox hasn’t been established.