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Has Anyone Ever Owned/Played DVD9s? - Physics Forums Most DVDs are DVD5s. Some - less common are DVD9s. I'm thinking of buying foreign language film that is a DVD9, but am not sure if it'd play on a normal DVD player. I've seen conflicting answers online. Some say they can always be played on regular DVD players, while others say you have...

3 Examples of jobs related to the interference of light Homework Statement Find 3 careers that are in some way related to the interference of light. Give a brief description of each career. Homework EquationsThe Attempt at a Solution My examples are X-ray Technician, Photonics Engineering and Optical Physics. My question is, is optical...

CD Players: How Do They Interfere? - Physics Forums The "reference beam" in the case of CDs and DVDs is the part of the laser beam that is reflected from the surface of the disk (aka the "land"). THe beam that goes into the pits will travel a total extra distance of 1/2 a wavelength through the plastic (so the depth of the pit must be 1/4 wavelength in the plastic).

Kinematics equations: Prove that a=vdv/ds - Physics Forums You are mixing up two situations. The equation a=vdv/ds applies for a particle moving as a function of time. x=x (t), v=v (t). Yes, you can write v as a function of x, but only on the basis that the relation x=x (t) can be inverted. E.g. if x=f (t) and v=g (t) then t=f -1 (x), so v=g (f -1 (x)). The equation applies where f is a function of two independent variables, x and y. If you try to ...

How does a CD act like a diffraction grating? - Physics Forums Hi, I having been looking on the internet and other threads and can't seem to find any detailed information on how a CD acts like a diffraction grating. What I understand: the CD has lots of little bumps which can split up light into its various colors. These colors can interfere...

How does the mechanism of a dual layer DVD read the data from both layers? I read things like "When a dual layer DVD burner reads a dual layer disc, the read-laser readjusts its focus past the semi-transparent first layer of physical data, on to an additional layer of data." and "Reflectivity of both recording layers of a dual layer recordable disc is the similar...

Question about plastic bags and humidity - Physics Forums Similar threads B Some questions about humidity and storing DVDs in a closed cardboard box Jul 21, 2023 Replies 3 Views 1K Question about humidity and plastic and rubber

Vinyl records, RPMs, and velocity. How does it work? FWIW, CDs and DVDs are recorded with the disk moving at a constant linear speed, and the rotation speed does change while the disk is playing. Because the data is recorded digitaally, it is easy for the player to "measure" how fast it is playing the disk, and so the rotation speed of a CD is actuallly controlled by the disk that is being played.

What is v (dv/dx) and how does it relate to acceleration? My mechanics syllabus suggests that we can model acceleration as ##v(dv/dx)## but what exactly does this mean? Can you give me (or link me to) some explanations and/or sample problems with worked solutions? In my experience so far we should always be using ##dv/dt## for ##a##.

Can Baby Einstein Tapes Benefit Adults Too? - Physics Forums I bought the Baby Einstein dvds after a friend suggested it. If they work or not? I can't say this for sure. But they provide visual and auditory stimuli which can relax and enhance learning, so I guess there's no harm done.