You Record the Spectrum of a Star and Find That

question 83

Multiple Choice

You record the spectrum of a star and find that a calcium absorption line has an observed wavelength of 394.0 nm.This calcium absorption line has a rest wavelength of 393.3 nm.What is the approximate radial velocity of this star?

• A) 5,000 km/s
• B) 500 km/s
• C) 50 km/s
• D) 5 km/s
• E) 0.5 km/s

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Definitions:

Timing

The selection of the best moment or speed at which to execute an action or operation.

Cash-Based Measure

An accounting method that recognizes revenues and expenses only when cash is exchanged.

Cash Flow

The overall sum of funds moving into and out of a company, particularly how it impacts the availability of cash.

Average Total Assets

A measure used to evaluate a company's efficiency at using its assets by calculating the average of its total assets over a specific period.