• Question: The light from a lightbulb reaches our eyes within a fraction of a second, is there anyway to replicate the waves of energy which reach our eyes?

    Asked by mijeffs to Akram, Gill, Jack, laurenceharwood on 21 Mar 2012.
    • Photo: Akram Alomainy

      Akram Alomainy answered on 21 Mar 2012:

      Great question 🙂

      Well scientists has been trying very hard to replicate energy and waves in lab settings … We can produce waves or lights through sources and we can detect the amount of energy such wave or light produces or projects on the human eyes or body by using simulated environment or computers! So we can understand all the details and hence we can explain why it behaves in such manner!

      I hope the answer is not confusing and if it is please give me a nudge 🙂

    • Photo: Jack Snape

      Jack Snape answered on 21 Mar 2012:

      We can use light to transfer energy and information … Lasers and radio waves are different forms of light and we can produce them very easily and use them to transfer information very efficiently.

      The internet works by sending light signals along cables that run all over the world (under the sea!) … if we weren’t able to replicate this light energy very easily then the internet wouldn’t work.

      Hope that answers your question

    • Photo: Laurence Harwood

      Laurence Harwood answered on 21 Mar 2012:

      The light from a light bulb contains lots of different wavelengths of light – not just visible ones either. Scientists use machines called spectrometers (literally, spectrum measuring devices) that can detect an measure these wavelengths. It is then possible to generate each individual wavelength and even mix them in the right proportions to give back the same light as the light bulb gives out. Does this help?

    • Photo: Gill Menzies

      Gill Menzies answered on 21 Mar 2012:

      We have become very good at sending light and radio waves over long distances. They recon by 2015 we will have over 3 billion internet devices sending signals around the globe, night and day.