2006-09-25 23:39:10 · 5 answers · asked by poovarasi l 2 in Science & Mathematics ➔ Physics
Now a days u can see it everywhere.
From the name, i guess u a tamilian.
In tamilnadu Driving licence, Indian Voter id, University degrees(select) etc hologram of the govt emblem is in the form of sticker.
2006-09-25 23:44:52 · answer #1 · answered by maran 2 · 0⤊ 0⤋
Holograms; it is an advanced form of photography that allows an image to be recorded in three dimensions. The technique of holography can also be used to optically store, retrieve, and process information.
The so-called "holograms" appearing in identity documents, credit cards, banknotes or expensive merchandise are not true holograms. Their apparent depth comes from stereoscopy (as in 3D comics). If you turn the "hologram" upside down, the depth of the image is inverted. All depth disappears if you turn the "hologram" 90° or if you look at it with just one eye. This is not the case with true holograms, which are not based on binocular vision but in the reconstruction of a virtual image. True holograms give the same 3D images when viewed at any angle or with only one eye.
2006-09-26 06:49:03 · answer #2 · answered by TK 4 · 0⤊ 0⤋
Holograms are the silvery-mirrory images/stickers you see all around, that either change the image (or make it seem like its moving) when you look at it from a different angle.
The image looks 3-dimensional, and generally is colored in green, orange and blue.
They are mostly used to identify that a product is original, and not a knock-off... You should have come accross them on the packaging of some of the branded stuff you buy out of a shop...
2006-09-26 06:53:08 · answer #3 · answered by Kidambi A 3 · 0⤊ 0⤋
I believe there are holograms in bank notes, passports and credit cards.
2006-09-26 06:43:33 · answer #4 · answered by Ashley 2 · 0⤊ 0⤋
here you have it all explained: http://en.wikipedia.org/wiki/Holograms
there are also some pictures.
2006-09-26 06:51:45 · answer #5 · answered by smilingcat 3 · 0⤊ 0⤋