Which wavelength region is most useful for investigating dense cores inside giant molecular clouds?
A) Infrared
B) X-rays
C) Ultraviolet
D) Optical (visual)

Question

Quizplus · Accepted Answer

Infrared radiation is absorbed less by dust than other forms of radiation, allowing it to penetrate dense clouds and reveal the structures within. Additionally, cold objects like dense cores emit more strongly in the infrared range, making it a useful tool for studying them. X-rays and ultraviolet radiation are absorbed more readily by dust and gas, while optical radiation is completely absorbed and scattered by dust in the clouds.

Which Wavelength Region Is Most Useful for Investigating Dense Cores