One of the Absorption Lines of Hydrogen Has a Rest

question 11

Multiple Choice

One of the absorption lines of hydrogen has a rest wavelength of 656 nm (at rest means with respect to the observer, like in a lab) . You observe several stars and measure the wavelength of this same hydrogen absorption line in each star. Based on the measured wavelength of this line, which star is moving towards the Earth the fastest?

• A)630 nm
• B)670 nm
• C)640 nm
• D)680 nm
• E)656 nm

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Definitions:

Decreases

A reduction in quantity, size, or the overall level of an economic indicator or financial value.

Expenses With No Cash Outflows

Costs recognized in the accounting period that do not require an immediate cash outlay, such as depreciation.

Expenses and Losses

Outflows or the using up of assets as a result of the company's efforts to generate revenue, including losses from various sources.

No Cash Outflows

A situation or period during which a business or project does not expend cash.