The internet could soon be transmitted to us at the speed of light. Visible light communication is a process that uses rapid pulses of light to transmit information wirelessly.

A commercial version of li-fi has been developed and if proved successful could soon be ready to compete with conventional wireless internet.

Harald Haas, professor of mobile communications at University of Edinburgh, explains how his team are using off-the-shelf LED lights to transmit data.

Listen to this latest episode of Click broadcast by the BBC World Service.

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