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Fran: I am looking at my reflection. When light from an object is reflected by a surface, it changes direction - it bounces off the surface. So, if we shine this light onto this mirror, then we can ...

Follow me please class. We’re here at the optician’s to get a good look at a human eye and find out how it works. Human eyes are actually spheres. The part that we can see is only just the front. That ...