armstrong and buzz aldrin, get ready for some more company! in the next ten years or so , an indian astronaut will be setting his foot on moon. it has been 37 years since a man has walked on moon – but when one does again , it is quite likely that it will be a desi-naut! keep those fingers crossed.
Category: science snapshots
the microchip or silicon chip has completely changed the color of
the electronic world by providing a new direction to it. it has lead
to the invention of electronic calculators, personal computers,digital
watches and microwave ovens.
the silicon chips are tiny crystals of silicon which contain large
number of electronic components. silicon is the most abundant element
on earth as the crust of the earth is largely made of silicon. but
silicon is not always found in free state as it always combined with
one or more additional elements. in an one sq.cm chip, about one
million electronic components can be squeezed. the size of chip is
smaller than our fingertips. they can be made to carry very small
electrical circuits
what,s the one thing that you would like to borrow from harry
potter?his invisibility cloak?
you don,t need to be a wizard to get one. scientists at the university
of california have developed a material that could make you
“dissapear”.it works like a movie screen. when you see a movie ,
doesn, t the screen”dissapear” although it really is there ?
iamgine you,re wearing a cloak made of this material. a video camera
will photograph the scene behind you . a computer and other devices
will bounce the picture to the front of your cloak . the cloak then
acts like a movie screen and makes you “invisible”. that,s the
plan,but a lot more research needs to be done.
suppose a tiger in the zoo is looking straight at you! you pull out
your camera and click. what happens then?well,every camera is a box
that is dark inside.it has a shutter that lets in a little light when
you press the button to take a picture.the light bouncing off the
tiger goes into the camera, through the lens. some cameras need a role
of film and digital cameras have a photo cell inside. when the light
enters the camera and hits the film or photo cell it forms the image
of the tiger there.a movie or video camera works the same way , but it
takes many more pictures one after another.
