Question

Scientists can use telescopes that are sensitive to different wavelengths of the electromagnetic spectrum to make observations across the universe. Which of these can be used to detect the motion of objects successfully even on a cloudy day?
Responses
A radio telescoperadio telescope
B infrared observatoriesinfrared observatories
C visible light telescopevisible light telescope
D ultraviolet observatoriesultraviolet observatories

Answer 1

A — radio telescope.

Radio waves penetrate clouds well, so radio telescopes can still observe (including Doppler shifts that show motion) in cloudy conditions. Visible and ultraviolet are blocked by clouds; infrared is strongly affected by water vapor and cloud emission.