Interstellar matter blocks our view of the disk of our Galaxy
A) not at all at any wavelength.
B) more-or-less equally at all wavelengths from radio waves to light waves.
C) most at radio wavelengths,where hydrogen absorbs radio waves efficiently,and least at optical wavelengths.
D) more at optical wavelengths,less in the infrared,and not at all at radio wavelengths.

Question

Quizplus · Accepted Answer

Interstellar matter, including dust and gas, absorbs and scatters light more at optical wavelengths, making it difficult to see through the disk of the Galaxy in visible light. However, infrared light can penetrate this dust more effectively, and radio wavelengths are even less affected by interstellar matter, allowing astronomers to observe through the interstellar medium at these wavelengths.

Interstellar Matter Blocks Our View of the Disk of Our