Visible radiation may be useful for transmitting
A) signals over wide areas towards a number of nearby stars
B) signals to advanced civilizations that never develop radio astronomy
C) focused signals to individual star systems nearby
D) signals to civilizations in neighboring galaxies

Question

Quizplus · Accepted Answer

Visible radiation would be best used for transmitting focused signals to individual star systems nearby since it has a limited range compared to other electromagnetic radiation types like radio waves. Transmitting signals over wide areas towards nearby stars or to civilizations in neighboring galaxies would require a more powerful and long-range communication method. Using visible radiation to transmit signals to advanced civilizations that do not develop radio astronomy would also not be necessary since they would likely develop other advanced communication methods.

Visible Radiation May Be Useful for Transmitting