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

question 81

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 redshift? (Note that the rest wavelength of the H $\alpha$ emission line is 656.3 nm.)

• A) 0.05
• B) 0.07
• C) 0.10
• D) 0.13
• E) 0.15

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Definitions:

Systematic Identification

The methodical process of recognizing and categorizing entities based on established criteria.

Self-Evident Meaning

Something that is clearly or obviously understood without the need for explanation or justification.

Comprehend Two Languages

The ability to understand and process information in two different languages.

Mutually Intelligible

pertains to languages or dialects that can be understood by speakers of each without prior study or special effort.