• Question: Does light have mass?

    Asked by Samuel to Samuel, Robson, Reshma, K-Jo, Alison on 6 Nov 2018.
    • Photo: Robson Witts

      Robson Witts answered on 6 Nov 2018:

      Light is a sub-atomic energy and therefore has no mass, hence why it travels so quickly.

    • Photo: Samuel Bancroft

      Samuel Bancroft answered on 6 Nov 2018: last edited 6 Nov 2018 1:46 pm

      The short answer is no!

      But it does depend on how you define mass… When you start thinking about things like special relativity, Physics can get quite weird!

    • Photo: K-Jo O'Flynn

      K-Jo O'Flynn answered on 6 Nov 2018:

      Light has no mass. Light is made of photons which has energy and momentum but no mass:D

    • Photo: Reshma Vora

      Reshma Vora answered on 6 Nov 2018:

      I think the other engineers have answered this very well – so I’ll just say no 🙂

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