If You Found a Galaxy with an H $\alpha$ Emission Line That Had a Wavelength of 756

question 44

Multiple Choice

If you found a galaxy with an H $\alpha$ emission line that had a wavelength of 756.3 nm, what would be the galaxy's distance if the Hubble constant is 70 km/s/Mpc? (Note that the rest wavelength of the H $\alpha$ emission line is 656.3 nm.)

• A) 650 Mpc
• B) 760 Mpc
• C) 3,200 Mpc
• D) 6,400 Mpc
• E) 7,600 Mpc

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Definitions:

Self-Regulation

The ability to manage one's thoughts, emotions, and actions in pursuit of long-term goals, critical in personal development and psychological wellbeing.

Immediate Compliance

The act of quickly or instantly following directives, rules, or commands without delay.

Aggressiveness

A behavior characterized by hostility or attack, often without a clear reason, stemming from a desire to dominate or assert power.

Developing Self-Understanding

The ongoing process of acquiring insight into one's own personality, emotions, motives, and behaviors, contributing to personal growth and self-awareness.