Question 1

The idea that the effect of gravity on you is the same as being in an accelerating reference frame is called&#10;A) free fall&#10;B) the principle of equivalence&#10;C) gravitational lensing&#10;D) time dilation

Accepted Answer

The principle of equivalence, proposed by Albert Einstein as part of his theory of general relativity, states that the effects of gravity are indistinguishable from the effects of acceleration. This means that being in a gravitational field is locally equivalent to being in an accelerating frame of reference.

Question 2

The curvature of space under general relativity can be caused by both _____ and _____.&#10;A) mass,light&#10;B) light,heat&#10;C) energy,mass&#10;D) gamma rays,radio waves

Accepted Answer

mass,light&#10;

Question 3

Mercury does not exactly repeat its orbit. This would not happen if Mercury's orbit were&#10;A) elliptical&#10;B) circular&#10;C) more tilted&#10;D) less tilted

Accepted Answer

Mercury's orbit is elliptical, which means it is not a perfect circle. This causes Mercury to move closer to and farther from the Sun at different points in its orbit. If Mercury's orbit were circular, it would always be the same distance from the Sun and would not repeat its orbit.

Question 4

Light moving away from a star will lose energy. This is due to&#10;A) interaction with the interstellar medium.&#10;B) a gravitational blueshift.&#10;C) a gravitational redshift.&#10;D) the temperature drop as the light moves into space.

Accepted Answer

A gravitational redshift occurs when light moves away from a gravitational field, such as a star, and loses energy, resulting in a shift to longer wavelengths (redshift).

Question 5

Gravitational deflections can focus and brighten the light from distant objects. This is called&#10;_____________________.

Accepted Answer

The answer of Gravitational deflections can focus and brighten the...

Question 6

Gravitational waves have been detected directly.

Accepted Answer

The answer of Gravitational waves have been detected directly....

Question 7

General relativity explains gravity as the flow of space.

Accepted Answer

General relativity explains gravity as the curvature of spacetime, not the flow of space.

Deck 27: General Relativity