Photons Have No Mass, and Einstein's Theory of General Relativity

question 39

Multiple Choice

Photons have no mass, and Einstein's theory of general relativity says

• A) their paths through spacetime are curved in the presence of a massive body.
• B) their apparent speeds depend on the observer's frame of reference.
• C) they should not be attracted to a massive object.
• D) their wavelengths must remain the same as they travel through spacetime.
• E) their wavelengths would grow longer as they travel through empty space.

---

Definitions:

Insane

A term describing severe mental illness or insanity, legally signifying inability to understand or control one's actions.

Checks

A written, dated, and signed instrument that directs a bank to pay a specific sum of money to the bearer.

Void

Having no legal force or effect; not legally binding or enforceable.

Holder in Due Course

A legal term in commercial law for a person who has acquired a negotiable instrument in good faith and for value, and thus has certain protections.