Einstein's Theory of Special Relativity Contains Some Very Strange Ideas

question 157

Multiple Choice

Einstein's theory of special relativity contains some very strange ideas such as time dilation (moving clocks run slow) , length contraction (moving lengths are shorter) , and lack of absolute simultaneity. What is the basis of these ideas?

• A) New technologies allow more precise measurements of length and time than had been possible in Newton's era, and the theory had to be reworked to fit this new evidence.
• B) The speed of light is the same for all observers in all reference frames.
• C) The ether (the medium that supports the passage of light) proved to be denser than originally thought.
• D) The fabric of spacetime is dominated by black holes.

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Definitions:

Epiblast Cells

Cells in the early embryo that give rise to the tissues of the body.

Mesoderm

Middle of the three germ layers of an embryo.

Mesoderm

The middle layer of an embryo in early development, which gives rise to muscles, bones, and circulatory and excretory systems.

Epiblast Cells

The cells in the early embryo that give rise to all of the body's tissues and organs during development.