Why Is It Not Possible to Look All the Way $\gt$

question 19

Multiple Choice

Why is it not possible to look all the way back to the Big Bang itself?

• A) Photons are not produced until the stars begin to shine at a redshift of z = 20.
• B) From redshifts of z =0 to 100, photons are gravitationally lensed by the dark matter in the universe.
• C) At redshifts of z \(\gt\) 1,000, most of the photons are blocked by large amounts of cold gas and dust.
• D) For redshifts of z \(\gt\) 1,000, photons are heavily altered because they easily react with individual protons and electrons in the universe.
• E) Photons from the Big Bang would be so strongly redshifted that we could never detect them.

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Definitions:

Randomized Block Design

An experimental design in which subjects are divided into blocks based on certain characteristics before being randomly assigned to different treatments, reducing the influence of confounding variables.

Analysis Of Variance

A statistical method used to compare the means of three or more samples to determine if at least one of the sample means is significantly different from the others.

Friedman Test

This non-parametric approach is utilized to identify distinctions in treatments throughout multiple testing sessions.

Test Statistic

A value calculated from sample data during a hypothesis test, used to decide whether to support or reject the null hypothesis.