 is actually very very challenging well thank you very much Robert Thompson now I see that there is a game over there is it okay if I bring my colleague James to have a go on your mirrors game absolutely now James I think this is really interesting because it seems that UV light can be so useful but of course it's also what damages us as well isn't it it's the UV rays from the sun that can give us skin cancer yeah we only think of ultraviolet light in a negative way really don't we because yeah spend too long outside in the sun that UV light coming from from you know a star in space