Time dilation and proper time

What is time dilation?

• time passes at the same speed for different people depending on their position in a gravitational field

• time passes at different speeds for different people depending on their position in a gravitational field

• time passes at the same speed for different people not depending on their position in a gravitational field

In time dilation, time is

• fixed

• relative

• constant

• light

How does velocity affect time dilation?

• Higher velocity results in greater time dilation

• Higher velocity results in less time dilation

• Velocity has no effect on time dilation

• Time dilation is only affected by gravity

What is the effect of time dilation on a particle moving at relativistic speeds?

• The particle's lifetime appears longer to a stationary observer

• The particle's lifetime appears shorter to a stationary observer

• The particle's mass decreases

• The particle's charge increases

According to Einstein's theory of relativity, what happens to time as an object approaches the speed of light?

• Time speeds up

• Time remains constant

• Time slows down

• Time reverses

Which of the following phenomena is best explained by the concept of time dilation?

• The bending of light around massive objects

• The slowing down of clocks in a fast-moving spaceship

• The increase in mass of an object as it speeds up

• The expansion of the universe

If our velocity is zero,

• t = 0

• t = t₀

• t = 2t₀

• t is infinite

Time dilation is the _____ of time

• stretching

• contraction

• postponement

• indifference

If our velocity is 0.995c

• t = t₀

• t = 2t₀

• t = 5t₀

• t = 10t₀

If our velocity is c,

• t = 0

• t = t₀

• t = 2t₀

• t is infinite