• Question: What does invisible light mean

    Asked by Marc Lyttle to Uday, Chloe, Irene, Pierre, NULL on 9 Nov 2015. This question was also asked by 238ntrd24, Moloney 66.
    • Photo: Uday Bangavadi

      Uday Bangavadi answered on 9 Nov 2015:

      Invisible Light, Isn’t it sounds cool. Yes, it is.

      Invisible light is something which human eyes cant see it. For example Infrared (IR) Light. Though the name says its Infra-red the deep IR is not visible to human Eye.

      In the Electro-magnetic spectrum the wavelength range of 400 to 700 nm can be seen by human eyes and any region apart from that range are not seen to humans.

    • Photo: NULL

      NULL answered on 17 Nov 2015:

      There are lots of different types of light. We can see red light, blue light, green light. In fact, when you look at a rainbow you can see all the colours that our eyes are able to pick up: from Red to Violet.

      But there are colours before Red, and past Violet! Some insects and other animals can see them, and we can make cameras that can see them. But our eyes can’t, because our eye cells don’t have the right proteins.

      Before Red is Infra-Red (which is actually light heat – our eyes can’t see it, but our skin can!).

      Past Violet is Ultraviolet – which is the kind of fuzzy light you get out of a blacklight, that makes things glow in the dark.

      Before even Infra-Red there are Microwaves – they are a type of light too! And before them, there are Radio waves.

      And even past Ultraviolet there are X-rays, which is a pretty useful type of light, it can pass straight through your body, except your bones!

    • Photo: Chloe Huseyin

      Chloe Huseyin answered on 17 Nov 2015:

      Uday answered this question really well! It’s not my area of science but just because you can’t see the light doesn’t mean it can’t be really useful 🙂

    • Photo: Irene Regan

      Irene Regan answered on 17 Nov 2015:

      Great Q:), I have to agree with Uday and Ricardo

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