If the Spectrum of a Distant Galaxy Is Observed to Have

question 40

Multiple Choice

If the spectrum of a distant galaxy is observed to have a calcium K absorption line that occurs at a wavelength of 500.4 nm,what is this galaxy's distance if the rest wavelength of this absorption line is 393.4 nm?

• A) 950 Mly
• B) 1,800 Mly
• C) 2,300 Mly
• D) 3,700 Mly

---

Definitions:

Internal Respiration

The exchange of gases between the blood and body cells, involving the intake of oxygen and release of carbon dioxide from metabolic processes.

External Respiration

The exchange of gases between the atmosphere and the blood through the alveoli of the lungs.

Tissue Respiration

The process by which oxygen is transported to cells and carbon dioxide is transported away, vital for cellular metabolism.

Main Bronchus

The primary division of the trachea that leads into each lung, facilitating air flow.