Special Relativity

In time dilation, time is

• fixed

• relative

• constant

• light

The speed of light is <blank> in all frames of reference, regardless of their motion.

• constant

• relative

• changes

• varied

Which of the following is true about time when an object approaches the speed of light?

• Time slows down

• Time speeds up

• Time stays the same

• Time will stop

Mark and James are both 16 years old. James became an explorer astronaut and travelled at light speed.

According to time dilation, which of the two will be younger after 7 years?

• Mark

• James

• Both boys will be of the same age

• Both boys will be 7 years old.

According to special relativity, what happens to time as you approach the speed of light?

• Time speeds up

• Time slows down

• Time remains constant

• Time reverses

What does the term "relativistic mass" refer to?

• The mass of an object as measured by an observer moving at the same velocity as the object

• The increase in mass of an object as its speed approaches the speed of light

• The mass of an object as measured in a gravitational field

• The mass of an object in its rest frame

The speed of light is

• 30,000 km/s

• 300,000 km/s

• 30,000 mi/ s

• 300,000 m/s

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Whose theory of relativity is tested by Black Holes?

• Stephen Hawking

• Plato

• Galileo

• Albert Einstein

The phenomenon when "an object approaches the speed of light, it contracts" is known as

• Time dilation

• Space-time

• Length contraction

• Relativity

What happens to time when an object travels at the speed of light?

• Time stops

• Time slows down

• Time speeds up

• Time stays the same