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Ibn al Haytham (Alhazen) is considered the initiator of modern optics and the scientific method. the Eye : By multiple experiments, with camera obscura (darkened chamber) in particular, Ibn al-Haytham

Ibn al Haytham (Alhazen) is considered the initiator of modern optics and the scientific method. The latter is based (1) on reciprocal relation between experiment/observation and theory (expressed here

A new challenge for people who love math and for intelligent man. we have here a difucult exercise with one solution so I challenge you to solve the exercise with another way without using mapple mathimatica

Hello everyone, here is my new post. The exercise of today it's about Algebra or to be specifically in lesson of matrix ( Determ ) the exercise take some time to resolve and I take it from a book of Jean-Marie

Welcome everybody this article is just for students and for the people who are interested about math, So I will publish different posts just like that ( exercises with solutions ) to improve ours skills

everything waits for rain there is no life without rain no living being can ever survive without water even though some beings do live without air ; some kinds of bacteria can live without air. source

In the Milky Way , dusty and cold molecular clouds -about ten degrees above the absolute zero -revolve around the central bulb and enter the spiral arms from time to time, where the medium is denser. Shock

Everything in the universe is in a state of motion, almost everything moves, be it animate or inanimate, but what's the difference between the motions of each category? For example, a straw floats on water

Hobo nickel is the most common term for the art of carving coins, giving them a new life. In this art, Roman Booteen from Russia is a master.   More info: Instagram

Office Wars Made An It Throne Today At Work I Got Really Bored At Work Today Too Much Time On Their Hands And Not Enough Work Bored At Work Monday Adventures At The Office See also : What Happens When

What Happens When People Are Bored At Work    Box Of Pringles + Bored Engineer   What Happens When Bookstore Employees Get Bored   Mechanic At My Work Got Bored And Welded This In His Spare

#11 You Only Need A Few Simple Items To Capture Highspeed Drops #12 Use Windows For A Softening Effect #13 Use Your Sunglasses As A Filter  #14 Instant Fake Macro Bokeh   #15 Use A Plastic

#1 Use Tinfoil To Create A Wall Of Bokeh   #2 Use A Fishtank To Get That Underwater Shot   #3 Use A Sifter For A Genius Shadow Hack   #4 Use A Piece Of Cloth And A Cardboard

 Philippe Echaroux is a famous French celebrity photographer  who used a flashlight, a drinking straw and a Big Mac box to make this lighting rig  :  He then began to photograph people

Many people complain around the world of commercials ads that invade our streets and our daily lives .. There are many of them are very bad and disturbing and unintentional and even if the purpose of some

Most likely you are here after your attention has attracted the impossible image of many coins lying on their edges in incredible balance while you fail to put a cup of tea on the table without pouring

There would be plenty of diamond rains in the giant planets like Neptune or Uranus. This is confirmed by experiments carried out in the field of high pressure physics. © The summary : Current models of

 Five interesting puzzles will test your intelligence :   A father with his son were traveling by car when they collided with a tree. The father died, and the son remained alive but he was

The world is ....

In order to know at once a large number of consecutive and not too great numbers (for example less than one billion), we have a method that is more than 2,000 years old:  Sieve of Eratosthenes