Einstein theories tell us that the speed of light
A)depends on one's frame of reference.
B)is constant in all frames of reference.
C)provides accurate clocks.
D)slows in a transparent medium.

Question

Quizplus · Accepted Answer

According to Einstein's theories, the speed of light is constant in all frames of reference, meaning it does not depend on the observer's motion or position. This is a fundamental principle of modern physics known as the constancy of the speed of light. The other options, such as the speed of light depending on the frame of reference or providing accurate clocks, are not in agreement with Einstein's theories. Although light can slow down in transparent media, this does not contradict the fact that its speed is constant in a vacuum, which is what Einstein's theories refer to.

Einstein Theories Tell Us That the Speed of Light