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

Parallax is not affected by the presence of dust in interstellar space because it involves measuring the apparent shift in position of a star relative to more distant background stars. This is not affected by dust, as long as the star being observed is relatively nearby. Cepheid variables, Type Ia supernovae, and Tully-Fisher relation can all be affected by dust because they rely on measuring the brightness or distance of objects, which can be altered by scattering or absorption of light by dust.

Scattering by Interstellar Dust Can Affect the Results of Some