Question

Suppose that an observer is moving at constant speed. Which statements correctly state the predictions of special relativity?

a) Time dilation occurs
b) Length contraction occurs
c) Simultaneity is relative
d) All of the above

Answer 1

In the context of special relativity, an observer moving at a constant speed will experience time dilation, length contraction, and the relativity of simultaneity.

Step-by-step explanation:

The predictions of special relativity when an observer is moving at a constant speed include several phenomena:

• Time dilation: Time passes slower for a moving observer relative to another observer. This effect is more pronounced at speeds approaching the speed of light and has been experimentally verified.
• Length contraction: Objects moving at high speeds appear to contract along the direction of motion from the perspective of a stationary observer. The faster the relative speed, the more pronounced the contraction.
• Relativity of simultaneity: The concept of simultaneous events is no longer absolute and can differ for observers moving relative to each other.

Therefore, the correct answer is d) All of the above.