half mirror Cube!
Logic
Level
2
How many images of a person who is in a room whose 2 adjacent walls and ceiling are plane mirror?
5
6
4
7
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1 solution
In the que,there are three perpendicular mirrors . Let's talk about simpler case . There are two perpendicular mirror. In this case,three images will formed in which one image is formed on each mirror and third one is common. Now,call these three mirrors A,B and C . Now ,three images will formed between A and C in which one is common.Similarly for (A and B ) and (B and C).Now,we can observe two image is formed on each mirror,hence 6 and there are three pair for common image and from symmetry there's only one image , therefore 7 images will formed. ...................... solution 2 we know,if we have two perpendicular mirrors,then three images will form . Now,if we introduce third mirror in it then there will four objects for that mirror (three images and object).so,total seven images will formed.