Inches to Spare Ewald Hering

This image was first created by German physiologist Ewald Hering in 1861 . Look at the two thick horizontal lines. How many inches to the left do the two horizontal lines meet. Hold a ruler up to the screen and you will see the answer.

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November 3rd, 2014 | Category: Mathematical, Real Life, Science Riddles |  Email This Riddle

2 guesses to Inches to Spare Ewald Hering

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• anant

  November 3, 2014 at 10:11 PM

  they are actually parallel lines

• Dude

  November 4, 2014 at 10:10 AM

  You are today’s winner Anant! This is an optical illusion and the lines are parallel. An oldie but a goodie.