What is time dilation and why is it significant for understanding Einstein's theory?

QUESTION 10 What curvature will the universe have if the matter and energy density of the universe is equal to the critical density? Open Closed Flat O None of the above QUESTION 11 Why can you not observe beyond the horizon distance? O Because of opaque gas O Because our telescopes are not powerful enough O Because light/information cannot travel faster than the speed of light O Because of the of black holes QUESTION 12 According to the Olber's Paradox, the night sky should be completely bright. However, when we observe at night, the sky is dark. Why does this happen? O Because the universe has a finite age O Because as the universe expands, objects at larger distances move faster, and the light from them shifts out of the visible part of the electromagnetic spectrum O Both a) and b) O Neither a) nor b)

Investigate the duality between space and time in Einstein's theory of relativity. How does the theory challenge classical notions of space and time?

Brief various postulates of special relativity.

In your own words (no plagiarism) state the two postulates of Albert Einstein's special theory of relativity. And explain them, again in your own words.

Define the concepts of Time Dilation and Length Contraction. Use equations and/or examples to support your answer.

Please solve the following special relativity question. Please explain each step with details and concepts. This is review for an exam