• Question: What is the smallest size of a particle visible to our eyes?

    Asked by anon-74398 to Will on 2 Jun 2020.
    • Photo: Will Smith

      Will Smith answered on 2 Jun 2020:

      Hi! The resolution of our eyes is limited by the lenses. Resolution is the distance between two objects just before they blur together, you might hear about the resolution of a camera. A higher resolution means you can see smaller things.

      Our eyes can see objects that are about 0.05mm accross, about the width of a really thin hair, thinner than that and we can’t see it (resolve it). This is much much bigger than even the largest particles.

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