Thursday, 21 May 2015
Sunday, 17 May 2015
Wednesday, 11 February 2015
Friday, 6 February 2015
Friday, 30 January 2015
Pinhole camera
What is a Pinhole Camera?
This is a very simple camera that captures black and white images. We used a box with one side that is pierced by a small hole letting in light. Putting photo paper on the surface opposite the hole, an image can be captured.
In air, the light rays reflect from an object moving in a straight line and enter through the hole in the box before reaching the paper layer, which will capture the image of the object. In the pinhole camera, light rays from the top and bottom of the object cross and the image of the object is then thrown on the layer. The operation of this device is similar, on principle, to that of the eye. When we look at an object, it reflects light rays which enter the eye through a hole (the pupil), and reverses image forms on a screen (the retina).
The first pinhole in the world
This is a very simple camera that captures black and white images. We used a box with one side that is pierced by a small hole letting in light. Putting photo paper on the surface opposite the hole, an image can be captured.
In air, the light rays reflect from an object moving in a straight line and enter through the hole in the box before reaching the paper layer, which will capture the image of the object. In the pinhole camera, light rays from the top and bottom of the object cross and the image of the object is then thrown on the layer. The operation of this device is similar, on principle, to that of the eye. When we look at an object, it reflects light rays which enter the eye through a hole (the pupil), and reverses image forms on a screen (the retina).
The first pinhole in the world
Friday, 23 January 2015
Turn your smartphone into a digital microscope
how do you turn your smartphone into a digital microscope?
For this project we decided to build a home made microscope with a plank of wood, and plank of plexiglass, screws and the most important thing: the lens!!
Our lens was found in a computer's CD player.
We have already determined the focal distance of our lens and it brings us beautiful results like this:
our lens can zoom 40 times.
We have seen how to make this homemade microscope on youtube at this adress:
For this project we decided to build a home made microscope with a plank of wood, and plank of plexiglass, screws and the most important thing: the lens!!
We have already determined the focal distance of our lens and it brings us beautiful results like this:
We have seen how to make this homemade microscope on youtube at this adress:
Friday, 12 December 2014
Wolf to Whales ?
Wolf to Whales ?
During the week of Sea
Ambassadors Mr. SOULIER become to talking about the evolution of
whales. We learning to the wolf is the whales ancestor and the whales to the species of cetaceans.
representation of a Mesonyx ( The wolf)
representation of a Protocetus ( The whales)
The species has left the terrestrial environment to return to the aquatic environment.
Finally we learning how to study the whales today :
-The Method of marking / tagging of cetaceans
-The Genetic typing
-The Marking capture, which allows among others to estimate the population of the species.
-The Genetic typing
-The Marking capture, which allows among others to estimate the population of the species.
Diving is important to recognize a species. The species can dive as deep as possible is the :
Now we estimated that about had ten of thousands of species to survive without protection. Fortunately today with the standards ,it can make with a few thousand species.The hunting of whales is banned today for all species.We hope to keep this diversity for many years , and maybe learn to see how they evolve !
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