In order to measure Venus's rotation,it was necessary to send a beam of electromagnetic radiation through the cloud layer.This electromagnetic radiation was
A) ultraviolet.
B) visible.
C) infrared.
D) short-wave radio or microwave.

Question

Quizplus · Accepted Answer

Short-wave radio or microwave radiation can penetrate through the thick cloud layer of Venus and be reflected back, allowing for scientists to measure the time it takes for the radiation to complete one rotation around the planet and thus determine the length of a Venusian day. Ultraviolet and visible light would be absorbed by the clouds and not penetrate through, while infrared radiation may be partially absorbed or scattered by the clouds, making it less reliable for measuring rotation.

In Order to Measure Venus's Rotation,it Was Necessary to Send