Can mirrors facing each other create infinite reflections?

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Sarah is a D.C.-based independent science journalist interested in the philosophical questions of science and technology and how research intersects with our daily lives. Her work has appeared in Popular Mechanics, IEEE Spectrum, Inverse, and Nature, among other outlets, and covers topics ranging from AI to particle physics and space travel.

In a hall of mirrors, you can see yourself stretched, squashed and multiplied thanks to the reflective physics of mirrors. One mirror reflects onto another, which reflects onto another, and so on. It may seem as if it could go on an infinite number of times. But can mirrors facing each other really create infinite reflections?

In this case, a perfect mirror doesn't necessarily refer to a mirror that reflects the most beautiful image but rather to a mirror that reflects 100% of light without absorbing any of it. When mirrors bounce light back and forth, they are participating in the law of reflection, Menon said. Under this physical law, light strikes and bounces off a smooth, reflective surface with an equal angle.

By submitting your information you agree to the Terms & Conditions and Privacy Policy and are aged 16 or over.How many reflections are possible?With very good mirrors — one that absorbs minimal light — you may be able to create"many thousands or tens of thousands of reflections," Menon said.

 

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