TeXes Science Practice Test

Which technique would be used to enhance imaging in astronomy?

1. Matrix multiplication

2. Optical filtering

3. Interferometry

4. Image decomposition

The correct answer is: Interferometry

Interferometry is a technique used in astronomy to enhance imaging by combining the signals received from multiple telescopes. This method takes advantage of the principle of wave interference, whereby the light or other electromagnetic waves collected by individual telescopes are combined to improve resolution and sensitivity. By analyzing the differences in the light received at each telescope, astronomers can construct detailed images of celestial objects that would not be possible with a single instrument alone. This is particularly important for observing distant stars, galaxies, and other astronomical phenomena, as it allows for clearer and more detailed representations of these objects. In contrast, the other techniques mentioned have different applications and do not specifically focus on enhancing imaging in the same way. Matrix multiplication might be related to image processing but is not an imaging technique by itself. Optical filtering is used to isolate specific wavelengths of light, which can help in certain observations but does not directly enhance imaging resolution. Image decomposition refers to breaking down an image into its constituent parts, which may be useful for analysis but does not improve imaging capabilities in the way interferometry does.