# What kind of optical illusion is it

**URL:** <https://forums.yoyoexpert.com/t/what-kind-of-optical-illusion-is-it/74888>\
**Category:** General Yo-Yo\
**Created:** [May 28, 2015, 3:34pm UTC](https://forums.yoyoexpert.com/t/what-kind-of-optical-illusion-is-it/74888 "2015-05-28T15:34:49Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![kadabrium](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/kadabrium/32/1522_2.png) [@kadabrium](https://forums.yoyoexpert.com/u/kadabrium)\
**Post date:** [May 28, 2015, 3:34pm UTC](https://forums.yoyoexpert.com/t/what-kind-of-optical-illusion-is-it/74888/1 "2015-05-28T15:34:49Z")

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that makes the width:diameter ratio of a yoyo look greater than usual?

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**Author:** ![Zorro](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/zorro/32/206266_2.png) [@Zorro](https://forums.yoyoexpert.com/u/Zorro)\
**Post date:** [May 28, 2015, 3:46pm UTC](https://forums.yoyoexpert.com/t/what-kind-of-optical-illusion-is-it/74888/2 "2015-05-28T15:46:12Z")

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I have no idea what you’re talking about

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**Author:** ![LeftyLink](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/leftylink/32/1321_2.png) [@LeftyLink](https://forums.yoyoexpert.com/u/LeftyLink)\
**Post date:** [May 28, 2015, 3:52pm UTC](https://forums.yoyoexpert.com/t/what-kind-of-optical-illusion-is-it/74888/3 "2015-05-28T15:52:10Z")

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> [@Zorro](#):
>
> I have no idea what you’re talking about

Then why would you reply to the topic…&nbsp; 😛

Anyways to answer the question, this illusion might be similar, where the height of the arch is comparable to the width of the yoyo whereas the base length is comparable to the yoyo’s diameter

[http://www.agenarisk.com/resources/probability\_puzzles/St%20Louis%20Arch.shtml](http://www.agenarisk.com/resources/probability_puzzles/St%20Louis%20Arch.shtml)

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**Author:** ![KiLbUcK](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/kilbuck/32/794_2.png) [@KiLbUcK](https://forums.yoyoexpert.com/u/KiLbUcK)\
**Post date:** [May 28, 2015, 4:15pm UTC](https://forums.yoyoexpert.com/t/what-kind-of-optical-illusion-is-it/74888/4 "2015-05-28T16:15:36Z")

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> [@LeftyLink](#):
>
> Then why would you reply to the topic…&nbsp; 😛
> 
> Anyways to answer the question, this illusion might be similar, where the height of the arch is comparable to the width of the yoyo whereas the base length is comparable to the yoyo’s diameter
> 
> [http://www.agenarisk.com/resources/probability\_puzzles/St%20Louis%20Arch.shtml](http://www.agenarisk.com/resources/probability_puzzles/St%20Louis%20Arch.shtml)

I didn’t give thanks to your post because of your insight of the optical illusion…it was primarily for your first statement!&nbsp; I HAVE to give thanks when one makes me smile.&nbsp; ;D