Which Items Are NOT Used as "Standard Candles" for the Measurement

question 258

Multiple Choice

Which items are NOT used as "standard candles" for the measurement of distances to distant galaxies?

• A) Cepheid variables
• B) the width of the 21-cm H I radio emission line
• C) supernova explosions
• D) the brightness and pulsation rates of pulsars

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Definitions:

UTP Cable

Unshielded Twisted Pair cable, a popular type of cable used in computer networking that consists of pairs of wires twisted around each other to reduce electromagnetic interference.

Cable Tester

A device that checks the electrical connections in a signal cable or other wired assembly for continuity, short circuits, and other common wiring faults.

NAS

Network Attached Storage, a file-level storage architecture connected to a computer network providing data access to a diverse group of clients.

HDD

Short for Hard Disk Drive, it is a data storage device used for storing and retrieving digital information using magnetic storage.