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Physics 21 Online
OpenStudy (anonymous):

how many images does the parallel mirrors produce?

OpenStudy (anonymous):

theoretically infinite..

OpenStudy (anonymous):

how?the speed of light is finite..and images are produced due to reflection...so there cant be infinite...

OpenStudy (anonymous):

this is kind of a paradox question, i believe there will be only two images, one for each mirror but they will look like they are infinite

OpenStudy (anonymous):

if im wrong then inifinty or some limited number thats hard or impossible to calculate

OpenStudy (anonymous):

In practice, mirrors are not one hundred percent reflective, and there will always be losses from each reflection, so the number of images will not be finite. I also recall reading something else about this in a book. I wil have a hunt for the book (cant remember which one it is), and report back should I find it.

OpenStudy (anonymous):

an infinity

OpenStudy (anonymous):

infinite images will be formed

OpenStudy (anonymous):

How do you know if an image is formed at all? The images formed by plane mirrors are virtual... no (real) image is formed until you stick another instrument in - like your eye - to form it. So "What do you mean by image?" is the first question... And when you do look, how many images are formed? - I think the answer is one - complex, but only 1.

OpenStudy (anonymous):

Answer is 1 when you look.... How many reflections? How long have they been parallel? and like JonnyMcA said, how good is the refletive coating?

OpenStudy (anonymous):

if you start with a double sides eye as both the reflected object and the observer, then add two parallel mirrors equadistant from the eye at one unit each with two units between the mirrors you will see the primary reflections have to cross two units to be witnessed.the secondary reflections take four units. the tertiary take six units. secondary reflections are the first reflection of one mirror to its opposite and these proceed by powers of 2. tertiary reflections are the reflections of one mirror to the other and back again. these units are all based on the light leaving the original object and making it back again to the eye. now all you have to do is pick a unit of measure and figure the speed of light at that unit to know the upward boundary of total number of reflections. at really large distances it is possible not to have any reflection at all and at quantum distances, well at quantum distance maybe youll have a reflection and maybey you wont. weather or not you even have a reflection really depends on how long you are willing to look. have fun!

OpenStudy (anonymous):

excellent answer....(i hope so)...

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