If the Rest Wavelength of a Certain Line Is 600

question 22

Multiple Choice

If the rest wavelength of a certain line is 600 nm, but we observe it at 594 nm, then

• A) the source is getting 1% hotter as we watch.
• B) the source is approaching us at 0.1% of the speed of light.
• C) the source is receding from us at 10% of the speed of light.
• D) the source is approaching us at 1% of the speed of light.
• E) the source is spinning very rapidly, at 1% of the speed of light.

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Definitions:

Continuous

Describes data or functions that are unbroken and consistent over a range, typically involving an infinite number of points.

Mean

The arithmetic average of a set of values or quantities, calculated by adding them together and dividing by the number of terms in the set.

Median

The middle value in a data set, which divides the data into two halves, or the value that has an equal number of data points above and below it.

Mode

The data point that is most frequently encountered in a set of data.