Einstein and The Special Theory of Relativity

The video explores Einstein's equation of general relativity, which relates mass, energy, and gravity, replacing Newton's law of gravitation. It discusses the simplification of these equations and their implications for understanding the universe. Einstein's initial solution involved a static universe, but Friedman's alternative considered a dynamic universe. Einstein's cosmological constant, initially deemed a blunder, was later validated by the discovery of the universe's accelerating expansion.

What does Einstein's equation of general relativity relate to?

• Mass, energy, and gravity

• Mass and velocity

• Energy and time

• Gravity and acceleration

What was Einstein's solution to the problem of a static universe?

• Introducing a new force

• Adding a cosmological constant

• Assuming a flat universe

• Removing mass from the equation

What assumption did Friedman challenge in Einstein's equations?

• The universe is contracting

• The universe is infinite

• The universe is flat

• The universe is static

According to Friedman's equations, what happens to the density of the universe as it expands?

• It remains constant

• It decreases

• It fluctuates

• It increases

What did astronomers discover about the universe's expansion in 1998?

• It is slowing down

• It is accelerating

• It has stopped

• It is constant

How did Einstein reportedly feel about the cosmological constant during his lifetime?

• He was proud of it

• He considered it a blunder

• He thought it was unnecessary

• He believed it was revolutionary

What role does Einstein's constant play in the universe according to recent discoveries?

• It causes the universe to contract

• It balances gravitational attraction

• It has no effect

• It makes the universe static