Live data from Hacker News

Math Professor Invents Non-Reversing Mirror

techfragments.com

31–40 of 83 posts

Re: Math Professor Invents Non-Reversing Mirror

#32
post #24

Completely disagree with the OP's idea of putting this in a rear-view mirror. One benefit of a rear-view mirror is that things that are on the right side of the mirror are to the right of you, and vice versa. This mirror would break that, unless I'm misunderstanding it. I'm interested in what applications this may have, if any really. I can see it working as a vanity mirror quite well, as then you can truly see yours…

[deleted]

Re: Math Professor Invents Non-Reversing Mirror

#34
post #2

was hoping for more technical details. maybe they're still going through the patent application?

according to the wikipedia article it's a surface of micro-mirrors that work in pairs. so it's basically a pair of mirrors scaled down and repeated. http://en.wikipedia.org/wiki/Non-reversing_mirror not very exciting really.

I imagine the hard part is actually optimizing that array of mirrors.

Re: Math Professor Invents Non-Reversing Mirror

#35
post #14

And he's holding MTW's Gravitation tome in the photo! BTW: Why do so few people pose with their favorite books (or holding any book) in profile photos, this was common when people had their portrats painted in the past. Has it become a turn-off?

Because most people don't read at all, or read BS (self-help books, how to succeed, cheap thrillers, 50 shades of gray...)

Have you read fifty shades? I find that people like to bag on stuff they've never actually experienced first hand.

Re: Math Professor Invents Non-Reversing Mirror

#36
After knowing the Feynman puzzle, I think this is probably more correctly described as a reversing mirror.

If you look into a metal spoon, you'll see both X and Y reversed. So I'm wondering if you could make this mirror simply by only curving the horizontal part. That's kind of what it looks like in the photo. And if so, why didn't someone think of this early? It's quite obvious.

Re: Math Professor Invents Non-Reversing Mirror

#37
post #8

I'm having a hard time visualizing this. If I am standing directly in front of this mirror and slowly reach forward with my right hand until I touch the mirror, will my hand be touching its mirrored self?

Try this with a metal spoon. If you bring in your right hand, it will be on the left side, but extremely distorted.

Re: Math Professor Invents Non-Reversing Mirror

#38

Earlier quoted context omitted.

Because most people don't read at all, or read BS (self-help books, how to succeed, cheap thrillers, 50 shades of gray...)

Have you read fifty shades? I find that people like to bag on stuff they've never actually experienced first hand.

Embarrassingly, I listened to a youtube video where a woman read the book aloud (I listened for about 30 pages). She ended up hitting herself in the head about a dozen times because the writing is that awful.

Re: Math Professor Invents Non-Reversing Mirror

#39
post #27
post #8

I'm having a hard time visualizing this. If I am standing directly in front of this mirror and slowly reach forward with my right hand until I touch the mirror, will my hand be touching its mirrored self?

It seems this mirror is especially shaped to project the ordinarily reflected image in a reversed way, thus putting an object near it surface will break the illusion and show skewed but normally reflected image.

Which seems to be what is going on with the book cover, in the picture in TFA.

Re: Math Professor Invents Non-Reversing Mirror

#40
post #15
post #8

I'm having a hard time visualizing this. If I am standing directly in front of this mirror and slowly reach forward with my right hand until I touch the mirror, will my hand be touching its mirrored self?

I'm guessing that the only way you could touch the mirror image of your finger is by doing so in the middle of the mirror. If you move the finger out toward the shoulder, I'm betting your arm would stretch off the mirror away from your body. I could be totally wrong though.

Look at the cover of the book that the trick mirror is resting on.
Post reply on HN