Discussion in 'QnA (read only)' started by kunwar, Feb 19, 2005.
as cd and dvd looks same.
only their capacity is different. 8)
CD and DVD look same, that's where the similarity ends....this has been said 100s of time.....
see, in CD writers the Laser used to write/read data on CD has a wavelength of 780nm.....but the Laser that's used to write/read DVD in a DVD Writer has a wavelength of 650nm.....
so using a laser of smaller wavelength, more data is crammed into the Disc.....
Also, some other specs like Pit Length, Track Pitch will be smaller in DVDs when compared to CDs......
I have heard that DVD's can store 5 GB compared to 700 Mb of VCD.
IS it possible that the laser waveength will get more reduced or have we reached the maximum limit?
Also in a DVD Writer is only the laser different or are the other equipments also different as in is it possile to replace the 780 nm laser of VCD with 650 nm laser for DVD?(i dont think so but whats the harm in getting another opinion/s)
whats goin on here......
DVD Roms are meant to play DVD's as well as CD's and CD-Roms are Meant to play All CD related Discs.....as simple as that.....
@kunwar.....were u born a few days ago or sometin???? just Jokin....why not use GOOGLE before Postin
though a DVD Disc may look similar to a CD thats its speciality it stands on an even more higher capacity and the Lens that reads the DVD work on a diff pattern all together....just apply a logic here if CD Roms could read DVD then Why would there be a Need For DVD roms to be manufactured
Btw here's a low down on all The DVD info U could feast ur Eyes on:
http://www.dvd.bx.sk (For all dvd softwares)
next time plzz search before postin
If that were possible, people wouldn't need to buy DVD drives now, would they? The costs incurred in "changing" a CD drive (its not just the laser that changes, a lot of the architecture, including the controller chips, change) into a DVD drive would make buying 2 DVD drives a cheaper option.
As for the wavelength issue, Blu-Ray drives are already in sale that use 405nm blue lasers. Its closest competitor, HD-DVD (which looks like it might turn into the domainant technology) uses the same 650nm laser but a more efficient compression algorithm to achieve greater data densities. Look up Google for more information.
Dood stop posting such topics! i mean what was the motive!
even my neighbour's dog would know that a dvd can't run on a cd-rom
well said.. this is a absurd question..i dunno how he can ask such a thing!!!
well....dude that's why they are called CD and DVD...there has to be some difference
A lot of differences.
Tryin' to play DVDs in a CD-ROM is just like tryin' to play normal CDs in a Floppy Drive!!
Lol dude what are u talkin abt
A normal Cd wont even fit into a Floppy Drive
But a DVD can Surely fit into a Cd drive (Though it cant be read)
but i got ur point though lol
Ok answer this my brain and your's look same does that mean they are same?? wel not atleast after you posted this thread
kiddin' no hard feelings
..:: peace ::..
lol well said.. i think this is the best explanation for ur query..
Separate names with a comma.