Amazing!! Optical devices that work on the principle of Multiple reflections

blind man

What are multiple reflections of mirror?

When two mirrors are parallel to each other, the number of reflections is infinite. Placing one mirror at a slight angle causes the reflections to curve. Increasing the number of flat mirrored surfaces or facets increases the number of reflections, but what you see depends on where you stand.

Daily objects we use that work on the principle of Multiple reflections:


The periscope is the eye of the submarine. It was invented and developed solely for the purpose of providing a means to view the surface without fear of detection by surface craft. While it is primarily simple in principle, actually it is a complicated piece of apparatus.

Periscopes allow a submarine when submerged at a relatively shallow depth, to search visually for nearby targets and threats on the surface of the water and in the air.

A periscope works on the Laws of Reflection which states that the ligh from the object falls on one mirror at a 45o angle from the object and is reflected. This reflected light then falls on another mirror and is again reflected until it reaches the human eye.


A kaleidoscope is an optical instrument with two or more reflecting surfaces tilted to each other in an angle, so that one or more (parts of) objects on one end of the mirrors are seen as a regular symmetrical pattern when viewed from the other end, due to repeated reflection.

Inside the tube, three strips of mirrors are joined to form a triangle; the angles of the mirrors also affect the view through the kaleidoscope. Typically, they are angled at either 45


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