Relativity Concepts

Question 1

What is your understanding of proper time?

Answer 1

The “Proper Time” is time measured by a single clock
this will be the one that is moving

A “proper time” interval is always shorter than the same interval measured by (two) clocks in another reference frame

Question 2

What is your understanding of proper length?

Answer 2

The “Proper length” is measured in the reference frame where object is not moving

Question 3

What is the relativistic total energy?

Answer 3

Total energy = kinetic energy + “rest mass” energy

γmc^2= (γ-1)mc^2+ mc^2

Question 4

What are the SR invariants

Answer 4

The space-time interval s^2= c^2 Δt^2 - Δx^2

The quantity (mc^2)^2= γmc^2-(pc)^2

Question 5

What are Conserved Quantity’s in SR

Answer 5

sum Relativistic momentum γmv
sum Relativistic energy γmc^2
when measured from same inertial frame

Question 6

what is the kinetic energy?

Answer 6

(γ-1)mc^2
as v slows down gamma approachs 1 as v speeds up gamma
As v→ c then γ→ ∞ i.e. more and more energy required to accelerate an object… to get to c requires an infinite amount of energy

Question 7

How to add Velocity close to speed of light

Answer 7

add velocity/1+velocitys/c^2

write our equation