camner cahaya leh baca CD?

jeppa

Tolong lah ak, ak fail sains..
dah lama ak terfikir, tp x terjawap dan x tercari pun. ak minta sape2 yg tau leh la gitau, nk post article pun bleh jer. malas siot nk search.

GAMEOVER

Prinsip pantulan. Atas cd tuh ader part yg bleh pantul, ader part yg takleh pantul.

Yg bleh pantul send signal as 1, yg takleh patul send signal as 0.

me_ai

ni la satu masalh dia,

ada problem, tp malas lak.

kat internet ni ada mcm sourceberguna, cuba la guna.

ok...anatara website yg aku selalu guna
how things work
wikipedia

paling mudah google la

jeppa

HEHE... jgn marah nk tya jer..

oo camtu, camner plak memori leh disimpan lam cd? cd d perbuat drp apa? ak skali pikir  hebat tol la sapa yg reka benda ni..  ada kaitan x dgn ion proton dari cahaya?

mbhcsf

google how things work : compact disk ; data storage  whatever

aku_EnSeM

1st, kene faham camna information is stored in computer using binary code of 1 and 0. Ape je yg kite store dlm hard disk akan kene translate into binary code.

Kt cd plak, dia guna prinsip superposition of light wave. Recall constructive and destructive interference. Kt permukaan cd yg berkilat tu sbnrnye ade bonggol2 kecik. Mse laser cd reader tu kene shine kt surface tu, ia akan terpantul balik. At the moment when the laser shines the edge between the elevated surface and the ground surface of the cd, destructive interference happens, and this is read as 1 (kalau x silap). Kt kawasan rata, constructive interference happens, and this is read as 0 (or its the other way round, x waper ingat). So, as the reader rotates the cd at high speed, a stream of binary code is produced, which is then interpreted by computer.



Sorry, aku xde visual presentation for this.

So, fikirkan effect klu kite calarkan surface cd tu. Laser tu akan terbias, interference pattern akan berybah, bukan seperti yang dikehendaki. So, mse tu la korang dengar lagu2 alien kt cd...