if you magnify it, the coverage area would be less, then it would be dangerous to humans. As you focus, magnify, it makes the energy of the light greater. Light does loose energy over distance. The light from the sun, that we bath in everyday, would fry us like a turkey if we were much closer to the sun. B Ut the distance it takes from sun to earth, the light loses its power and hence a sunburn, when exposed to long.
So,a I can see then Defusing the light, making it safe for humans
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