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Has Anyone Ever Owned Played DVD9s? • Physics Forums Most DVDs are DVD5s, which are single-layer discs, while DVD9s are less common and feature a double-layer format There is uncertainty regarding whether DVD9s will play on standard DVD players, with conflicting information available online Generally, if a DVD player supports DVD-2 or DVD-3 formats, it should also be able to read DVD-9s, but compatibility can depend on the age of the player
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)
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##
How does the mechanism of a dual layer DVD read the data from both . . . 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