ch 35 hw – Flashcards

Relativity equations for time, length and momentum hold true for

A postulate of special relativity is that the speed of light

Event A occurs before event B in a certain frame of reference. In another frame of reference, event A could occur

All events and all things exist in "the spacetime continuum" with coordinates

The clock on the Big Ben Tower in London reads 12 noon. If you travel away from the clock at a very high speed and view it with a telescope, you would see

A certain light source blinks once per second in its own frame of reference. As you recede from the blinking source, you observe the frequency of blinks to be

As a blinking light source uniformly accelerates away from you, you observe the blinks

A light source blinks once per second in its own frame of reference. As you approach the blinking source, you observe the frequency of blinks to be

According to special relativity, tomorrow's travelers can travel

A heavy meterstick has mass m. When the meterstick is thrown like a spear past you at speed v, you measure its momentum to be 2mv. What do you measure its length to be?

An astronaut traveling forward at 0.87c holds a meterstick in spear-like fashion. An observer at rest sees the spear's length as

The Lorentz factor, γ,

When we apply the Lorentz factor γ to momentum, we

When you shake an apple to and fro, you're shaking

How fast would a light beam appear to Einstein if he were traveling in the same direction at 90% of the speed of light?

When you run along the hall from one classroom to another you're moving through

According to the special theory of relativity, while traveling at very high speed your pulse rate

Harry takes a space voyage and returns to find his twin sister has aged more than he has. This is evidence that

As you recede from a steady light source, the wavelength of the emitted light appears

Two spaceships approaching each other move at very close to the speed of light, each sending a beam of light to the other. Each measures the speed of light from the other spaceship as

A spaceship whizzes past a planet at high speed. An observer on the planet sees a contracted spaceship, while an observer on the spaceship sees

According to Einstein's theory of special relativity

To the surprise of Michelson and Morley, their interferometer experiment provided evidence that the speed of light is

According to the special theory of relativity, all laws of nature are the same

Two lightning bolts are seen to strike two distant locations at the same time. Seen from a different location, the two lightning bolts

You look at the clock on the Big Ben Tower in London and it reads 12 noon. If you could hypothetically travel away from the clock at the speed of light and view it with a telescope, it would

As you approach a steady light source, the wavelength of the emitted light appears

According to relativity theory, if a space trip finds a son or daughter biologically older than their parents, then the space trip is taken by the

A 10-meter-long spear is thrown at relativistic speeds through a 10-meter-long pipe. (Both these dimensions are measured when each is at rest.) When the spear passes through the pipe

There is an upper limit on the speed of a particle, which means there is also an upper limit on its

If an antimatter meteor of mass m were to strike the Earth, the amount of radiant energy produced would be

The ether theory of light propagation is

As a blinking light source uniformly accelerates away from you, you observe the blinks

If the frequency of blinks for a light source appears to double as the light source approaches you, the frequency of blinks as it moves away from you at the same speed

Suppose you and your sister travel at different speeds in space and you note a slowing of her clock. Compared with her clock your sister will notice that your clock runs

A spaceship traveling very fast relative to you fires a stream of photons at speed c away from you. You measure the photons' speed to be

When we apply the Lorentz factor γ to length contraction, we

Electrons fired in vintage TV tubes traveled at about 0.25 times the speed of light, having more momentum and energy than would be required classically to get that speed. Strictly speaking, this

According to Einstein, events that are simultaneous in one frame of reference

When a blinking light source moves relative to you, the speed of the light

Relative to some reference frame in the universe, you may now be traveling at a speed

Radioactive muons formed high in the atmosphere have an average lifetime of 2 millionths of a second and travel toward Earth at nearly the speed of light. Because of their altitude most of them should have decayed by the time they reach the Earth's surface, according to pre-relativity physics. They don't because they

A girl standing on the ground observes a rocket ship move past her at half the speed of light. Compared to the rocket's length at rest, she sees the rocket's length as

When a high-velocity beam of electrons is bent by a magnetic field, relativistic effects

According to the well-known equation E = mc2,

What is special about the ratio distance traveled per unit of time?

An observer moving with a light clock in a spaceship sees a light flash bouncing up and down between parallel mirrors in 1 nanosecond. An observer at rest outside the spaceship sees the same up-and-down flash in

The stretching out of time due to motion is called time

Clocks on a spaceship moving at high speed relative to the Earth run more slowly when viewed from

As a light source blinking at a steady rate approaches you at an increasing speed (accelerating toward you), the rate at which the blinks encounter you

As the speed of a particle approaches the speed of light, the momentum of the particle