Question

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

Answer 1

The astronomer is using the technique of photometry to measure the brightness of the star through different filters in the visual (yellow-green), violet, and ultraviolet regions.

Step-by-step explanation:

The name of the technique being used by the astronomer is photometry. Photometry is the measurement of the brightness of an object, such as a star, using filters to measure the intensity of light at different wavelengths. In this case, the astronomer is using different filters in the visual (yellow-green), violet, and ultraviolet regions to measure the brightness of the star.