Ramblings of a nerd

woow, i have to much time on my hands!

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quantumaniac: 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. 

quantumaniac:

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. 

69,925 notes

realcleverscience: 4lughero: No matter how long the slinky is, the bottom of the slinky will stay still (hover) until the top reaches it. Even if the slinky is over 1000 feet long. Woah. Is this for real? Any physics fans have more info and can possibly explain this without too much jargon?   Update: More info at blogs.discovermagazine.com P.s. Source seems to be the youtuber 1veritasium’s science channel. Seems pretty good, check it out!

realcleverscience:

4lughero:

No matter how long the slinky is, the bottom of the slinky will stay still (hover) until the top reaches it. Even if the slinky is over 1000 feet long.

Woah.

Is this for real? Any physics fans have more info and can possibly explain this without too much jargon?  

Update: More info at blogs.discovermagazine.com

P.s. Source seems to be the youtuber 1veritasium’s science channel. Seems pretty good, check it out!

(via physicsphysics)