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Can you solve the vampire hunter riddle? - Dan Finkel

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  • 2,383 Questions Answered
  • TEDEd Animation

Let’s Begin…

You’ve stealthily descended into the darkness of a vampire cave, setting a sequence of mirrors as you go. When the sun reaches the right angle in the sky, a beam of light will ricochet along the mirrors, strike a diffuser, and illuminate the great chamber where the vampires sleep. Can you place the diffuser correctly and flood the lair with sunlight? Dan Finkel shows how.


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TED-Ed Animations feature the words and ideas of educators brought to life by professional animators. Are you an educator or animator interested in creating a TED-Ed Animation? Nominate yourself here »

Meet The Creators

  • Educator Daniel Finkel
  • Director Igor Coric
  • Narrator Addison Anderson
  • Character Designer Igor Coric
  • Animator Nemanja Petrovic
  • Editor Nemanja Petrovic
  • Producer Milica Lapcevic
  • Sound Designer Saso Puckovski
  • Content Producer Gerta Xhelo
  • Editorial Producer Alex Rosenthal
  • Associate Editorial Producer Bethany Cutmore-Scott
  • Fact-checker Brian Gutierrez
    • See more
Additional Resources for you to Explore
Interested in solving more riddles? Head on over to the New York Times to practice your problem-solving skills on another riddle by the educator.

To continue deep-diving into the world of math, check out Math for Love.

Customize This Lesson

Create and share a new lesson based on this one.

About TED-Ed Animations

TED-Ed Animations feature the words and ideas of educators brought to life by professional animators. Are you an educator or animator interested in creating a TED-Ed Animation? Nominate yourself here »

Meet The Creators

  • Educator Daniel Finkel
  • Director Igor Coric
  • Narrator Addison Anderson
  • Character Designer Igor Coric
  • Animator Nemanja Petrovic
  • Editor Nemanja Petrovic
  • Producer Milica Lapcevic
  • Sound Designer Saso Puckovski
  • Content Producer Gerta Xhelo
  • Editorial Producer Alex Rosenthal
  • Associate Editorial Producer Bethany Cutmore-Scott
  • Fact-checker Brian Gutierrez
    • See more

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