- #1
utkarsh5
- 23
- 0
need help with contraconcave mirrors...
i saw the video of mirage illusion on the inter-net .it consists of two concave mirrors placed in front of each other such that focus point on each mirror is on the pole of the other mirror.one of the mirrors has a hole in between.i decided to make one for myself(as i can't get it here where i live).i calculated that the aperture of the mirrors should be equal to ?7 times their focal length(f*2.64).are my calculations correct?also,what size should i make the hole?i am asking this since i can't take risk of ordering wrong mirrors,since i can't get them here,so they will be costly.please answer.thanks in advance!
i saw the video of mirage illusion on the inter-net .it consists of two concave mirrors placed in front of each other such that focus point on each mirror is on the pole of the other mirror.one of the mirrors has a hole in between.i decided to make one for myself(as i can't get it here where i live).i calculated that the aperture of the mirrors should be equal to ?7 times their focal length(f*2.64).are my calculations correct?also,what size should i make the hole?i am asking this since i can't take risk of ordering wrong mirrors,since i can't get them here,so they will be costly.please answer.thanks in advance!