TED-Ed

You’re a vampire hunter entering the enemy’s lair. Can you outsmart this tricky brainteaser and vanquish the vampires? -- 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. Lesson by Dan Finkel, directed by Artrake Studio. Sign up for our newsletter: http://bit.ly/TEDEdNewsletter Support us on Patreon: http://bit.ly/TEDEdPatreon Follow us on Facebook: http://bit.ly/TEDEdFacebook Find us on Twitter: http://bit.ly/TEDEdTwitter Peep us on Instagram: http://bit.ly/TEDEdInstagram View full lesson: https://ed.ted.com/lessons/can-you-solve-the-vampire-hunter-riddle-dan-finkel Thank you so much to our patrons for your support! Without you this video would not be possible! Derek Drescher, Karisa Caudill, Zhong Ming Zenny Tan, Christina Salvatore, Brady Jones, Todd Gross, Alexis Hevia, Heidi Stolt, Robert Seik, Coenraad Keuning, Charles A Hershberger, Laura Cameron Keith, Abhishek Goel, Marc Bou Zeid, JY Kang, Anastasiia, Madee Lo, Arpita Singh, Karl Laius, Tu-Anh Nguyen, Guy Hardy, Brandy Sarver, Jose Arcadio Valdes Franco, Akinola Emmanuel, igor romanenko, Dian Atamyanov, Abhishek Bansal, Austin Randall, Ryan B Harvey, Jennifer Kurkoski, phkphk123321, Arlene Weston, Mehmet Yusuf Ertekin, Ten Cha, Les Howard, Kevin O'Leary, Francisco Leos, Robert Patrick, Marcus Appelbaum, Alan Wilder, Mohamed Elsayed, Aleksandr Lyozin, Angel Pantoja, Eimann P. Evarola, Carlos H. Costa, Tariq Keblaoui, Bela Namyslik, Nick Johnson, Won Jang and Sandra Fuller Bocko.