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Quantumaniac is where it’s at - and by ‘it’ I mean awesome.

Over here I post a ton of physics / math / general interesting posts in an attempt to make your brain feel good. My aim is to be as informative as possible, all while posting fascinating things that hopefully enlighten us both a little to the mysteries of our truly wondrous universe(s?). Plus, how would you know if the blog exists or not unless you observe it? Boom, just pulled the Schrödinger’s cat card. Now you have to check it out - trust me, it said so in an equation somewhere.

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The Impossible Mini-Golf Hole
A ball hit at point A, in any direction at any speed, will never enter the hole at point B. The ball, of any elasticity, could bounce forever - but it would never reach its destination. 
A similar idea was presented by Ernst Straus in the 1950s - would a room lined with mirrors always be completely illuminated by a single light? Finally, in 1997, D. Castro presented the figure above. He proposed that if a candle is placed at point A in a room full of mirrors, and you stand at point B - you will never see the reflection of the candle. Light, much like the hypothetical golf ball, only travels in straight lines - and no straight path can ever start at Point A and eventually end at Point B.  Although this seems counterintuitive, trust the math.
 Read more. 

The Impossible Mini-Golf Hole

A ball hit at point A, in any direction at any speed, will never enter the hole at point B. The ball, of any elasticity, could bounce forever - but it would never reach its destination. 

A similar idea was presented by Ernst Straus in the 1950s - would a room lined with mirrors always be completely illuminated by a single light? Finally, in 1997, D. Castro presented the figure above. He proposed that if a candle is placed at point A in a room full of mirrors, and you stand at point B - you will never see the reflection of the candle. Light, much like the hypothetical golf ball, only travels in straight lines - and no straight path can ever start at Point A and eventually end at Point B.  Although this seems counterintuitive, trust the math.

 Read more

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