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lukinhasb OP t1_j9tf3ay wrote

Reply to comment by nosmelc in Would an Earth-like planet with identical technology be able to detect signals from us? by lukinhasb

Is radiowave signal the most appropriate for this kind of communication? Suppose that we want to send a signal out there to be picked up, would it be radio?

Does radio lose power when it travels long distances?

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mobyhead1 t1_j9tgbps wrote

Radio is the only kind we can send at our technology level. Any electromagnetic signal (this includes radio) we send decreases in power with the square of the distance.

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nosmelc t1_j9th4j4 wrote

Yes radio does lose power when it travels long distances.

I think radio might be the most appropriate for this kind of communication because it should be the first method of communication that technological civilizations discover. That means everybody should be able to send and receive radio.

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Heisenberg_Hat_ t1_j9tfvjg wrote

Neutrinos or gravity waves are some of the more exotic/advanced theoretical communication methods proposed.

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solidcordon t1_j9tnxez wrote

Laser light would be more efficient but you would have to know where to point the laser.

Probably something that would need to be "negotiated" with radio communication first to convey specifics of wavelength though.

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Italiancrazybread1 t1_j9twyy3 wrote

You can make a laser out of radio waves, there's nothing special about radio waves that prevent you from making a radio frequency laser.

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solidcordon t1_j9ty7vm wrote

good point, well made.

RASER sounds pretty cool too.

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