You Observe a Distant Quasar in Which the Lyman Alpha

question 59

Essay

You observe a distant quasar in which the Lyman alpha line of hydrogen (rest wavelength = 121.6 nm)is found at a wavelength of 547.2 nm.When the light from this quasar was emitted,how large was the universe compared to its current size?

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Definitions:

Sublimation

A defense mechanism in psychology where socially unacceptable impulses or idealizations are unconsciously transformed into socially acceptable actions or behavior.

Denial

A psychological defense mechanism involving refusal to accept reality or facts, therefore avoiding dealing with painful feelings.

Repression

A defense mechanism where unpleasant thoughts, memories, or desires are excluded from conscious awareness.

Projection

A defense mechanism where one attributes their own unwanted emotions or traits to other people.