Scattering by interstellar dust can affect the results of some standard measuring techniques. Which one of the following is NOT affected by the presence of dust?

Question

Quizplus · Accepted Answer

Masers are not affected by interstellar dust because they are emitted from compact regions near stars and are not scattered by the diffuse interstellar medium. The other options - RR Lyrae stars, spectroscopic parallax, and fundamental plane - are all affected by interstellar dust because the dust can absorb or scatter the light, causing the object to appear dimmer and redder than it actually is.

Scattering by Interstellar Dust Can Affect the Results of Some