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You can use Morse Code. The Navy uses Signal Lamps, which are lamps that produce concentrated, focused pulses of light. But you could just use a flashlight, depending on what you were communicating and the the circumstances of your predicament.
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∙ 13y ago
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How did the Apollo 13 communicate back and forth from space to Earth?
They used a radio.
How much power was used by the transmitter on the Voyager spacecraft to communicate with Earth?
20 Watts
Why is a satellite used to reflect light?
Because it is like a mirror and it can be used to reflect light
What can be used to separate light into all of the colors?
A prism can be used to separate light into its component colors.
What is sun used for?
it is used for heating,light and eletricedy
What type of electromagnetic signals are currently used to communicate through space?
Infrared light Microwaves Visible light
Can ultra violet light be used for mobile phone communications?
no only mobile phone can communicate lights can't. :)
What pens can communicate with the computer?
You can communicate with computers using the Light Pens And Graphics Tablets.
What is the fastest speed you can communicate in?
The speed of light.
What do boats use to communicate silently?
Boats (people) can communicate silently with flags or light signals.
What do fireflies use to communicate with each other?
That what the light they produce is for. They use it to communicate and to find mates.
How do you communicate with light?
you have a bum with a 3 yead old then you see loads of blue light everywhere
What allows a computer to communicate with another device with a beam of light?
Fiber Optic networking allows computers to communicate with a beam over light oven thin strands of glass cabling.
What tools did the Egyptians use to communicate?
the egyptians used a fether and ink to communicate
What was hiroglyphics used for?
they were used for people back in time to communicate like in Egypt would use them to communicate or write on walls.
What is hotmail used for?
to communicate with your friends
How did the government used to communicate?
They didnt.
