How Do Astronomers Measure the Relative Amounts of Dark Matter

question 115

Multiple Choice

How do astronomers measure the relative amounts of dark matter and luminous matter in the early universe?

• A) The same way they do in the present universe: rotation curves, gravitational lensing, etc.
• B) By measuring the sizes of the peaks created by acoustic waves in the cosmic microwave background.
• C) By measuring the relative amplitudes in the acoustic overtone waves in the cosmic microwave background.
• D) By measuring the relative frequencies in the acoustic overtone waves in the cosmic microwave background.

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Definitions:

Port

In computing, a port is a communication endpoint, a physical or virtual connection point used for connecting devices or for data transfer between devices and a computer.

Nanometers

A unit of measurement equal to one billionth of a meter, often used to describe the scale of semiconductor components.

IOPS

Input/Output Operations Per Second; a performance measurement used to benchmark the speed at which storage devices can read and write data.

TPM

Trusted Platform Module, a hardware-based security feature that provides cryptographic services to enhance the security of computer systems.