A Galaxy 200 Mpc from Us Has a Recessional Velocity

question 28

Multiple Choice

A galaxy 200 Mpc from us has a recessional velocity of about 14,000 km/s.If it emits radiation at a wavelength of 121 nm, how much is that wavelength shifted when we observe it?

• A)5.7 x 10^-12 m
• B)5.7 x 10^-10 m
• C)5.7 x 10^-9 m
• D)5.7 x 10^-7 m
• E)5.7 x 10^-6 m

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Definitions:

Spermatogenesis

Spermatogenesis is the biological process by which sperm cells are produced from male primordial germ cells by way of mitosis and meiosis.

Meiosis

A type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, essential for sexual reproduction.

Maturation

The process of becoming mature, either in a biological sense, such as the physical and developmental changes that occur as an organism grows, or in a psychological context.

Epididymis

A long, coiled tube that stores and carries sperm from the testes to the vas deferens.