An astronomer is measuring the brightness of a particular star through a telescope, using different filters in the visual (yellow-green), violet, and ultraviolet regions. What is the name of the technique being used by this astronomer?
A) spectroscopy
B) geometry
C) interferometry
D) photometry

Question

Quizplus · Accepted Answer

The technique of measuring the brightness of celestial objects through different filters (such as in the visual, violet, and ultraviolet regions) is known as photometry. This method allows astronomers to analyze the intensity of light from stars or other celestial bodies across different wavelengths.

An Astronomer Is Measuring the Brightness of a Particular Star