Astronomers Can Tell Whether a Light Source Approaches or Recedes

question 24

Multiple Choice

Astronomers can tell whether a light source approaches or recedes from Earth by

• A)its temperature.
• B)its change in temperature.
• C)its absorption spectra.
• D)the Doppler effect.
• E)all of the above

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Definitions:

Automobiles

Motor vehicles designed for transporting passengers on roads.

Profit-oriented

A business approach focused on making financial gain and maximizing profit margins.

Purchased Goods

Items or commodities that have been bought by individuals or organizations, ranging from consumables to durable goods.

Cognitive Processes

The mental activities involved in acquiring, processing, and storing knowledge, including perception, memory, and thinking.