Which one of the following causes small air bubbles in water, which is stored in a glass vessel, to appear to shine with a silvery luster?
The reason why the air bubble shines in water is because of the total internal reflection. • Total internal reflection is a phenomenon in which light travels back in the same medium or reflects back. It occurs when light travels from an optically denser to a rarer medium. • This happens in an air bubble in water when light travels from water to air and back out. This creates the shine or the silvery lustre. Hence option D is correct.
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