Choose the BEST answer to the following: Einstein’s second postulate tells us that the speed of light (a) depends on one’s frame of reference. (b) is a constant in all frames of reference. (c) provides accurate clocks. (d) slows in a transparent medium.

Choose the BEST answer to the following: Einstein’s second postulate tells us that the speed of light (a) depends on one’s frame of reference. (b) is a constant in all frames of reference. (c) provides accurate clocks. (d) slows in a transparent medium.

Astronomy

1st Edition

ISBN:9781938168284

Author:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Publisher:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Chapter19: Celestial Distances

Section: Chapter Questions

Problem 6E: The meter was redefined as a reference to Earth, then to krypton, and finally to the speed of light....

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Concept explainers

Frame of reference

In physics, a frame of reference is a coordinate system used to specify either the position or the orientation or velocity of a body. The origin of the coordinate acts as a reference point for measuring the position or relative motion of a body. The coordinate system can be a cartesian coordinate, cylindrical coordinate, or a polar coordinate.

Question

Choose the BEST answer to the following:

Einstein’s second postulate tells us that the speed of light

(a) depends on one’s frame of reference.

(b) is a constant in all frames of reference.

(d) slows in a transparent medium.

Definition Definition Rate at which light travels, measured in a vacuum. The speed of light is a universal physical constant used in many areas of physics, most commonly denoted by the letter c . The value of the speed of light c = 299,792,458 m/s, but for most of the calculations, the value of the speed of light is approximated as c = 3 x 10 8 m/s.

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Answer: b

i,e is a constant in all frames of reference.

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