When the Absolute Magnitudes, or Brightnesses, of Stars Are Plotted

question 54

Multiple Choice

When the absolute magnitudes, or brightnesses, of stars are plotted against their surface temperatures or colors, we obtain a(n)

• A) Hertzsprung-Russell (or H-R) diagram.
• B) straight line.
• C) random pattern.
• D) none of the above

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Definitions:

Trichiasis

A condition where eyelashes grow inward, potentially irritating the eye.

Emmetropia

The condition of the eye where the optical system is perfectly matched to the length of the eyeball, resulting in sharp vision at all distances.

Visual Acuity

The clarity or sharpness of vision, often measured by the ability to discern letters or numbers at a standardized distance on an eye chart.

Conjunctivitis

An inflammation or infection of the outer membrane of the eyeball and the inner eyelid, also known as pink eye.