Comments on: Which One Is Larger – Jastrow Illusion

By: Lisa

Lisa — Wed, 07 Dec 2011 22:31:10 +0000

Actually my guidance counselor in 5th grade showed us this and explained it. If you look closely, the tops of those are wider than the bottoms, hence the illusion. It isn’t very noticeable but once you know, you will always spot it.

By: Suor de Sapo

Suor de Sapo — Sat, 26 Nov 2011 20:42:27 +0000

I can’t believe those who can’t believe the pieces are the same size! Just pick two sheets of paper over each other, and with a treasure cut a curved shape like in the video. You can paint them with distinctive colours but it is not necessary (or just turn over one of them if the paper was obtained from a magazine with colourful pages). Can you see it now?

By: Zeb

Zeb — Sat, 26 Nov 2011 17:10:09 +0000

if you ever put together little race car tracks ou can see this on the curved track pices

By: james

james — Wed, 12 Oct 2011 22:38:11 +0000

who wants one?

By: james

james — Wed, 12 Oct 2011 22:26:51 +0000

it’s real

By: Non of your bizzo

Non of your bizzo — Sun, 12 Jun 2011 19:29:57 +0000

AMAZING’!!!!’!!!

By: elena

elena — Sat, 12 Feb 2011 20:33:14 +0000

it’s just because the bottom of the blocks are smaller than the top, no matter what angle you look at them it still appears that way! my 7th grade science teacher showed my class this once.

By: constance

constance — Mon, 03 Jan 2011 01:51:59 +0000

i think the illusion is actually the table the blocks are on…i believe the table curves upwards and outwards near the camera lens, creating the illusion that the pieces are different sizes.

By: Quiana

Quiana — Sun, 01 Aug 2010 02:52:56 +0000

thats pretty cool!

By: Nommers

Nommers — Tue, 27 Jul 2010 05:05:33 +0000

Coolez, we don’t know, and really don’t care. But they are the same size. Practically, I think it’s the curve in the polygonal shapes that makes it look that way. If they put the shapes on top of each other the way they did it at 0:04 and 0:12, and they looked the same length, then put them on top of each other the way they did at 0:17, then one would be longer than the other. I understand if you don’t get my point. But the shadow is kind of obvious that they don’t switch the blocks.

By: coolez

coolez — Sun, 06 Jun 2010 23:41:14 +0000

the vid is made by a girl right right???

By: Angeliqa

Angeliqa — Tue, 20 Apr 2010 22:26:05 +0000

Slavco explained this perfectly, I happen to teach science and we have used this same example to teach perspective.
To Mike, regarding the trapezoid ‘correction’, trapezoids only require parallel sides, they don’t have to be straight.
And as for everyone who feels the need to call every illusion ‘dumb’ please just shut up. If the only thing that you have to offer on the forum is “thats dumb” then just don’t post, no one cares to read such a useless statement anyway.

By: Chives!

Chives! — Tue, 20 Apr 2010 12:32:07 +0000

I think its the fact that the side are slanted in giving the shapes a curved rhombus look but the in the picture they seem to be different degree angles and the fact that the bottom curve is the exact degree of the top thus making the shapes seem different sizes when put in those positions if you draw it your self on graph paper you will be able to see it makes perfect sense…yes? no? maybe?

By: Nejc Pass

Nejc Pass — Sat, 03 Apr 2010 14:20:42 +0000

Greate illusin. I tryed this once.

By: Johnny

Johnny — Fri, 02 Apr 2010 21:27:54 +0000

I wonder how its possible