I Observe a Galaxy That Is 100 Million Light Years

question 50

Multiple Choice

I observe a galaxy that is 100 million light years away. Which of the following do I see?

• A)the light from the galaxy as it is today, and it is redshifted
• B)the light from the galaxy as it was 100 million years ago, and it is redshifted
• C)the light from the galaxy as it is today, and it is blueshifted
• D)the light from the galaxy as it was 100 million years ago, and it is blueshifted
• E)Nothing: the galaxy lies beyond the cosmological horizon.

---

Definitions:

Chemical Reaction

A process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction.

Constant Pressure

A condition or process in which the pressure remains unchanged over time.

Equilibrium

A state in which opposing forces or influences are balanced, often referring to chemical reactions reaching a state where the rates of the forward and reverse reactions are equal.

Products

The substances that result from a chemical reaction.