The Spectral Luminosity Class of the Star Spica Is B1 $\tau$

question 122

Multiple Choice

The spectral luminosity class of the star Spica is B1 V, and that of the star $\tau$ Ceti is G8 V. From this information, one knows that Ceti is _____ Spica.

• A) cooler but has the same luminosity as
• B) cooler and has a lower luminosity than
• C) hotter but has the same luminosity as
• D) hotter and has a lower luminosity than

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Definitions:

Presbyopia

A condition associated with aging, where the eye gradually loses the ability to focus on close objects.

Cataracts

A medical condition where the lens of the eye becomes progressively opaque, resulting in blurred vision.

Contrast Sensitivity

The ability of the visual system to distinguish between light and dark areas of a visual image.

Hyperopia

A vision condition, also known as farsightedness, where distant objects can be seen more clearly than close ones.