Asked by Andy Blackwell Uncategorized
Why does laser ray produce coherent light?
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Asked in Math and Arithmetic, Physics, Geometry
What is the geometric term of a beam from a laser?
A narrow beam of light that travels in a straight line?
Is there a name for the blue light that reads a Blu-ray disk?
Asked in Physics
Difference between normal light and laser light ray?
Asked in DVD Players
Why is Blu-ray called so?
Asked in Cable Television, DVD Players, HDTV
Is Blu-ray an optical drive?
Yes, a Blu-Ray device is an optical reader. CD's, DVD's, and Blu-Rays are called Optical Devices because the reader looks at the disks using light. The light is a laser. Just like a DVD, a Blu-Ray uses a laser beam to light up and read the information on the disk. This is like an old record needle running along a record groove and reading the information. However, the laser used by CD's, DVD's and Blu-Rays does not touch the disk. It just lights it up. The difference between DVD's and Blu-Rays is the colour of laser. DVD's use a red laser light, Blu-Rays use one that is blue. Different coloured laser beams read different sizes. Writing and reading on a DVD with a red laser beam is like using a crayon, a blue beam is like a sharp pencil. The Blu-Ray is an optical device, just like a DVD, but because it uses a "finer pencil" it can put more information onto the disk.
Asked in Medical Technologies, X-Ray
What is the difference between cathode ray and x-ray?
Will you be able to watch Blu-ray DVD on your PC with regular DVD drive if you install Blu-ray playing software?
Asked in Blu-ray Players
Is the Blu-Ray disc a magnetic disc storage media?
No, Blu-Ray is an optical disk storage media, similar in operation to DVD and CD media. The difference is that Blu-Ray has much higher capacity because it uses a blue LASER instead of the red LASER used for DVD and CD. The blue light can resolve smaller features than red light can, so the pits can be made smaller and closer together.