Below Are Two Images of the Milky Way at Different

question 32

Multiple Choice

Below are two images of the Milky Way at different wavelengths. Which one was taken at infrared wavelengths, and why do you think so?

• A) A; there are many cool stars in the image, which emit a lot of infrared light.
• B) A; the dust in the galaxy mainly blocks infrared light and lets visible light through.
• C) B; we see mainly warm dust emitting thermal radiation.
• D) B; infrared light passes through the dust so we can see the galaxy's structure more clearly.
• E) B; stars in the central bulge shine only at infrared wavelengths.

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Definitions:

Confidence Interval

A range of values, derived from the sample data, that is used to estimate the true value of a population parameter with a specified level of confidence.

Variance

A statistical measure that represents the degree of spread in a dataset or the variability of the observations from the average.

Population Mean

The average value of a particular characteristic within an entire population.

Confidence Intervals

A range of values, derived from the sample data, that is likely to contain the value of an unknown population parameter, with a certain level of confidence.