Live data from Hacker News

Double-mirror illusion

journalofillusion.net

31–40 of 49 posts

Re: Double-mirror illusion

#32
post #29

The apparent failure to mirror "correctly" left and right in this illusion reminds me of a great interview question I heard: why does a mirror reverse things left and right, but not flip them top and bottom? It can be fun to watch people scratch their head over it.

Easy enough for anyone with eyes to see the obvious explanation.

Re: Double-mirror illusion

#34
post #31

Please, for the love of god, stop with the custom scroll bars, and on the wrong side of the viewport, no less!

Yeah, this might be one of the worst websites I've seen. This is really unenjoyable to navigate.

Is it intentional for some form of irony?

Re: Double-mirror illusion

#35
post #29

The apparent failure to mirror "correctly" left and right in this illusion reminds me of a great interview question I heard: why does a mirror reverse things left and right, but not flip them top and bottom? It can be fun to watch people scratch their head over it.

Easy enough for anyone with eyes to see the obvious explanation.

Are you implying _two_ eyes? Because if you think that's the reason, just try closing one eye and looking into a mirror and you'll see that nothing's changed.

(Also, as an exception to your statement, I have eyes, and I wasn't able to grasp why it happens until I watched a video about it.)

Re: Double-mirror illusion

#37
post #29

The apparent failure to mirror "correctly" left and right in this illusion reminds me of a great interview question I heard: why does a mirror reverse things left and right, but not flip them top and bottom? It can be fun to watch people scratch their head over it.

I'm afraid Feynman's already spoiled the answer for me.

N zveebe qbrfa'g syvc yrsg gb evtug, vg npghnyyl syvcf sebag (pybfrfg gb zveebe) gb onpx.

Re: Double-mirror illusion

#38
post #30

On mobile, not only did I not get to see the images, I couldn't even leave the site by pressing back. On both chrome and FF on Android.

At least for FF on Android, long press the back button to bring up a history list.

Re: Double-mirror illusion

#39
post #16

For anyone who's confused about where to find the images: Click "Figures" in the sidebar on the right. For anyone who's confused about how this works: The objects aren't what they appear to be from any angle. In fact, they're weird mirror symmetric objects that bend backwards in ways you wouldn't expect. It's our shape recognition that makes them look flatter than they are. This also makes them look like asymmetric o…

> For anyone who's confused about where to find the images: Click "Figures" in the sidebar on the right.

Thank you! Here's a link: https://journalofillusion.net/index.php/joi/article/view/983...

Re: Double-mirror illusion

#40

Please, for the love of god, stop with the custom scroll bars, and on the wrong side of the viewport, no less!

The rationalisation appears to be that there are two viewports, one left, one (when expanding sidebar items) right.

The left-hand scrollbar controls and reports on the left-hand viewport. The right-hand scrollbar the right-hand viewport.

More conventional organisation (and less confusing, possibly) would be to retain the scrollbars to the right of the corresponding viewport.

Note that left-handed scrollbars are occasionally used elsewhere, as in the X11 Athena Widgets (Xaw) set:

https://en.wikipedia.org/wiki/X_Athena_Widgets>

Post reply on HN