If the Distance Between Us and a Star Is Doubled,with

question 118

Multiple Choice

If the distance between us and a star is doubled,with everything else remaining the same,the luminosity

• A)is decreased by a factor of four,and the apparent brightness is decreased by a factor of four.
• B)is decreased by a factor of two,and the apparent brightness is decreased by a factor of two.
• C)remains the same,but the apparent brightness is decreased by a factor of two.
• D)remains the same,but the apparent brightness is decreased by a factor of four.
• E)is decreased by a factor of four,but the apparent brightness remains the same.

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Definitions:

Household Cleaner

A chemical product or mixture used in homes to remove dirt, bacteria, and other contaminants from surfaces.

Dizziness

A feeling of unsteadiness, often accompanied by a sensation of spinning or swaying.

LD50

The lethal dose of a toxin, radiation, or pathogen that is sufficient to kill 50% of the target population, used in toxicity testing.

Toxic

Having the effect of poisoning or harming the environment or living organisms, often used to describe chemicals or substances.