Interstellar Matter Blocks Our View of the Disk of Our

question 78

Multiple Choice

Interstellar matter blocks our view of the disk of our Galaxy

• A) not at all at any wavelength.
• B) more-or-less equally at all wavelengths from radio waves to light waves.
• C) most at radio wavelengths,where hydrogen absorbs radio waves efficiently,and least at optical wavelengths.
• D) more at optical wavelengths,less in the infrared,and not at all at radio wavelengths.

---

Definitions:

Sales Units

The quantity of product sold, often used as a measure in assessing sales performance and operational efficiency.

Fixed Expenses

Costs that do not change with the level of production or sales over the short term, such as rent, salaries, and insurance.

Break-even Point

The break-even point is the sales level at which total revenues equal total costs, resulting in neither profit nor loss.

Degree of Operating Leverage

A financial ratio that measures the sensitivity of a company's operating income to its sales volume, showing the impact of fixed costs on earnings.