PHY 111 Ch 28 Quiz 1

The Big Bang is regarded as the expansion of

space

How did Mr. Hubble calculate the age of the universe?

by measuring the rate of expansion of the universe

Relativity is the

study of how space, energy, and mass are related to time

Fire a cannonball from a cannon and it curves due to gravity. Shine a light from a flashlight and it

curves per second the same as the cannonball

Cepheids are types of stars that regularly change how bright they are over a period of a few

days

According to Einstein, gravity is not the force exerted by one object on another, but rather the

effect we witness when a large mass causes a curvature in the shape of spacetime

Compared to a clock at the bottom of a very tall skyscraper, a clock at the top of this skyscraper will appear to run

faster

Edwin Hubble discovered that the farther away a galaxy is the

faster it is receding from us

The universe as a whole is

has yet to be determined, although most astrophysical data points to a flat universe

If the elliptical orbit of Mercury were more eccentric, its precession rate would be

larger than it is now

Technically, its not mass that causes the curvature of spacetime, but

mass density

The "Big Bang: refers to the

point in time in which the known (and perhaps knowable) universe came into being

According to cosmic inflation theory, the distribution of galaxies we see today is a consequence of

quantum fluctuations in the exceedingly small early universe

Light is without mass, so how can gravity have an effect on light?

the space through which the light passes is curved

Cosmology is the study of the overall structure and evolution of

the universe

According to inflation theory, parallel lines appear to remain parallel because

the universe is so unbelievably large

The currently accepted reasoning for why the cosmic background radiation is so uniform in temperature is because

this temperature uniformity was achieved in the moments before cosmic inflation

Cosmic background radiation refers to

uniformly distributed residual radiation that resulted from the Big Band

According to relativity theory, it is possible to reverse time and grow younger when you

you can never grow younger

How is it possible that todays diverse universe was able to arise from that which was very homogeneous at its first moments?

Inflation magnified ultrasmall quantum variations in position and momenta

General relativity is most concerned with

all of these

Cosmic Inflation refers to

an extremely rapid expansion of the early universe that occurred in an extremely brief period of time

The Big Bang occurred

at the tip of your nose

The "redshift" of a galaxy refers to the rate

at which is receding

The quantity that undergoes a red shift is

both of these