If the Apparent Visual Magnitude of a Star Is 7

question 50

Multiple Choice

If the apparent visual magnitude of a star is 7.3,what does this tell us about the brightness of the star?

• A)It is one of the brighter stars in the sky.
• B)It is bright enough that it would be visible even during the day.
• C)It is not visible with the unaided eye.
• D)It appears faint because of its great distance from the Earth.

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Definitions:

Oily Substance

Any material with a greasy or slippery consistency, often produced by the sebaceous glands of the skin.

Tears

A secretion from the lacrimal glands used to lubricate the eyes, cleanse them from irritants, and provide antibacterial protection.

Optic Nerve

A paired nerve that transmits visual information from the retina to the brain.

Blind Spot

The point in the visual field that corresponds to the lack of light-detecting photoreceptor cells on the optic disc of the retina where the optic nerve passes through.