The Spectrum of a Galaxy Is Observed to Have an H

question 36

Essay

The spectrum of a galaxy is observed to have an H $\alpha$ emission line at a wavelength of 856.3 nm.What is its distance if the Hubble constant is 22 km/s/Mly? Note that the rest wavelength of the H $\alpha$ emission line is 656.3 nm.

---

Definitions:

Adaptive Immunity

Immune status in which there is an ability to recognize, remember, and destroy a specific antigen.

Acquired

Developed or obtained through one's own actions or experiences, not inherent or innate.

Specificity

The ability to distinctly identify or recognize differences, often used in the context of immune responses or biochemical interactions.

Palatine Tonsils

Lymphatic tissue located on either side of the throat that helps defend the body against infection by trapping pathogens.