BRAIN TEASERS
Brain Teasers User Profile

Vasanth Prabhu

rank
623
points
0
See full ranking list
short ranking list
621. Siddharth Kumar 0
622. music my life 0
623. Vasanth Prabhu 0
624. Hannes Bloomfield 0
625. Krishnaswami CVR 0
last 3 solved tasks

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 Squirrel

A squirrel is living in a pine tree, when one day it starts to shake and rock.

So he looks outside and he sees a large elephant trying to climb up the tree.

"What the hell!" the squirrel exclaims. "What the hell do you think you're doing climbing up this tree?!"

The elephant responds. "I'm climbing up here to eat pears."

The squirrel is befuddled. "You moron! This is a pine tree! There are no pears!"

The elephants stares at him for a moment before replying, "I know. I brought my own."
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.