The First Postulate of Special Relativity States That ____

question 13

Multiple Choice

The first postulate of special relativity states that ____.

• A) observers can always detect their uniform motion relative to other objects
• B) observers can never detect their uniform motion except relative to other objects
• C) the speed of light is constant regardless of location
• D) the speed of light in a vacuum is constant
• E) energy equals mass multiplied by the speed of light, squared

---

Definitions:

Autonomic Reflex

A bodily reflex mediated by the autonomic nervous system that regulates the function of internal organs, such as heart rate and digestion, without conscious effort.

Pupillary Light

The reflex change in pupil size in response to changes in light intensity, which is vital for protecting the retina and adapting vision to varying light conditions.

Trigeminal

Pertaining to the fifth cranial nerve, which is responsible for sensation in the face and motor functions such as biting and chewing.

Glosspharyngeal

A cranial nerve that supplies motor fibers to the pharynx and tongue, and sensory fibers to the tonsils, pharynx, and middle ear, playing a key role in swallowing and taste.