BRAIN TEASERS
Brain Teasers User Profile

mellowh Mas!

rank
440
points
2
See full ranking list
short ranking list
438. Abhay Ambale 2
439. Ashok Ashok 2
440. mellowh Mas! 2
441. chmanish aol 2
442. Lisa Ortiz 2
last 3 solved tasks
I can be cracked, I can be made. I can be told, I can be played. What am I?
What body part is pronounced as one letter but written with three, only two different letters are used?

Camera obscura

In 1544, a solar eclipse was viewed at Louvain, which was later depicted in the first published book illustration of the camera obscura in use. Dutch mathematician and astronomer Reinerus Gemma-Frisius viewed a solar eclipse using a hole in one wall of a pavillion to project the sun's image upside down onto the opposite wall. He published the first illustrationof a camera obscura, depicting his method of observation of the eclipse in De Radio Astronomica et Geometrica (1545). Several astronomers made use of such a device in the early part of the 16th century. Both Johannes Kepler and Christopher Scheiner used a camera obscura to study the activity of sunspots. The technique was known to Aristotle (Problems, ca 330 BC).

The trick

The trick is to not let people know how really weird you are until it's too late for them to back out.

Jokes of the day - Daily updated jokes. New jokes every day.
Follow Brain Teasers on social networks
This site uses cookies to store information on your computer. Some are essential to help the site properly. Others give us insight into how the site is used and help us to optimize the user experience. See our privacy policy.