The first image is a hyperlink to QI clip on youtube about hydrogel balls in water having the same refractive index.Transparent; translucent & opaque. Light is reflected so that we can see objects.
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The first image is a hyperlink to QI clip on youtube about hydrogel balls in water having the same refractive index.Transparent; translucent & opaque. Light is reflected so that we can see objects.
