Holograms :: essays research papers

Toss a pebble in a pool -see theripples? Now drop two pebbles close to loll aroundher.Look at what happens when the two sets ofwaves combine -you start up a new wave When ac difference and a trough meet, they evictcel out and thewater goes flat. When two c placiditys meet, theyproduce whiz, bigger crest. When two troughscollide, they groom a single, deeper trough. Believeit or not, youve just found a key to understandinghow a hologram works. But what do waves in a syndicate have to do with those amazing three-dimensional pictures? How do waves go for ahologram look the the likes of the real thing? It all starts withlight. Without it, you hindquarterst see. And much like theripples in a pond, light travels in waves. When youlook at, say, an apple, what you really see are thewaves of light reflected from it. Your two eyeseach see a slenderly different view of the apple.These different views tell you about the applesdepth -its form and where it sits in relation to otherobjects. Your brain processes this information sothat you see the apple, and the rest of the world, in3-D. You can look around objects, too -if theapple is blocking the view of an orange behind it,you can just move your head to mavin side. Theapple seems to "move" out of the way so you cansee the orange or even the back of the apple. Ifthat seems a bit obvious, just depict looking behindsomething in a regular photograph You cant,because the photograph cant reproduce theinfinitely complicated waves of light reflected byobjects the lens of a photographic camera can only focus thosewaves into a flat, 2-D image. But a hologram cancapture a 3-D image so lifelike that you can lookaround the image of the apple to an orange in thebackground -and its all thanks to the special kindof light waves produced by a laser. " blueprint"white light from the sun or a lightbulb is acombination of every colour of light in thespectrum -a mush of different waves thats ineffectivefor holograms. But a laser shines light in a thin,intense beam thats just one colour. That meanslaser light waves are equivalent and in step. Whentwo laser beams intersect, like two sets of ripplesmeeting in a pond, they produce a single newwave pattern the hologram. Heres how ithappens descend coming from a laser is split into twobeams, called the object beam and the referencebeam. Spread by lenses and bounced off a mirror,the object beam hits the apple.Holograms essays explore papers Toss a pebble in a pond -see theripples? Now drop two pebbles close together.Look at what happens when the two sets ofwaves combine -you get a new wave When acrest and a trough meet, they cancel out and thewater goes flat. When two crests meet, theyproduce one, bigger crest. When two troughscollide, they make a single, deeper trough. Believeit or not, youve just found a key to understandinghow a hologram works. But what do waves in apond have to do with those amazing three-dimensional pictures? How do waves m ake ahologram look like the real thing? It all starts withlight. Without it, you cant see. And much like theripples in a pond, light travels in waves. When youlook at, say, an apple, what you really see are thewaves of light reflected from it. Your two eyeseach see a jolly different view of the apple.These different views tell you about the applesdepth -its form and where it sits in relation to otherobjects. Your brain processes this information sothat you see the apple, and the rest of the world, in3-D. You can look around objects, too -if theapple is blocking the view of an orange behind it,you can just move your head to one side. Theapple seems to "move" out of the way so you cansee the orange or even the back of the apple. Ifthat seems a bit obvious, just find out looking behindsomething in a regular photograph You cant,because the photograph cant reproduce theinfinitely complicated waves of light reflected byobjects the lens of a camera can only focus thosewaves into a flat, 2-D image. But a hologram cancapture a 3-D image so lifelike that you can lookaround the image of the apple to an orange in thebackground -and its all thanks to the special kindof light waves produced by a laser. " expression"white light from the sun or a lightbulb is acombination of every colour of light in thespectrum -a mush of different waves thats unsubstantialfor holograms. But a laser shines light in a thin,intense beam thats just one colour. That meanslaser light waves are homogeneous and in step. Whentwo laser beams intersect, like two sets of ripplesmeeting in a pond, they produce a single newwave pattern the hologram. Heres how ithappens gay coming from a laser is split into twobeams, called the object beam and the referencebeam. Spread by lenses and bounced off a mirror,the object beam hits the apple.