An Astronomer Observes Two Stars of the Same Surface Temperature

question 140

Multiple Choice

An astronomer observes two stars of the same surface temperature, but one has twice the diameter of the other. How many times larger is the energy production rate per unit surface area from the larger star compared with that from the smaller star?

• A) 2
• B) 4
• C) 16
• D) They are the same.

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Definitions:

Retinal Image

The projection of visual stimuli onto the retina, the light-sensitive layer of tissue at the back of the eye, where it is converted into neural signals.

Unchanging

Remaining the same over time; not undergoing any transformation, variation, or development.

Loudness

The perception of the intensity of sound waves, often measured in decibels, as experienced by a listener.

Amplitude

The height or strength of a wave signal, which in the context of sound, determines its loudness.