# Can you solve the vampire hunter riddle?

- Institution: TED
- Department: TED-Ed
- Speaker: Daniel Finkel
- Year: 2019
- Level: For everyone
- Language: English
- Subjects: Mathematics
- Source: [TED](https://www.ted.com/talks/daniel_finkel_can_you_solve_the_vampire_hunter_riddle)
- Licence: [CC BY-NC-ND 4.0](https://creativecommons.org/licenses/by-nc-nd/4.0/) (Non-commercial use only, and no changed versions.)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

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. \[Directed by Artrake Studio, narrated by Addison Anderson, music by Saso Puckovski\].

## Lectures

1. [Can you solve the vampire hunter riddle?](https://invisiblenetwork.ai/learn/ted/daniel_finkel_can_you_solve_the_vampire_hunter_riddle/bd7e2d6385e5), 4 min (TED's player)