Has Anyone Ever Owned/Played DVD9s? • Physics Forums
May 6, 2022 · 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 …
CD Players: How Do They Interfere? - Physics Forums
Nov 9, 2004 · 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 …
Kinematics equations: Prove that a=vdv/ds • Physics Forums
Dec 1, 2019 · 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 …
How does the mechanism of a dual layer DVD read the data from …
Mar 22, 2012 · 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 …
What is v(dv/dx) and how does it relate to acceleration?
Mar 12, 2013 · The discussion focuses on the expression v (dv/dx) as a model for acceleration, highlighting its derivation using the chain rule where v = dx/dt. This formulation is presented as …
Rainbow light reflection on TV from my hand • Physics Forums
Jun 21, 2025 · The phenomenon of rainbow light reflection on a TV screen from a hand is attributed to the TV acting as a diffraction grating, where white light from the hand is split into …
Question about whether UV light can penetrate a cardboard box
Aug 16, 2020 · Cardboard can either absorb or reflect UV light, depending on the angle of incidence. Generally, closed cardboard boxes will protect items inside from UV exposure, …
Vinyl records, RPMs, and velocity. How does it work?
Jan 17, 2012 · 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 …
The Secret: Transforming Mercury to Gold Using Everyday Materials
Mar 31, 2011 · The discussion centers on the theoretical possibility of transforming mercury into gold using everyday materials, particularly through the use of radioactive components found in …
Understanding Wood's Anomaly in Optics - Physics Forums
Jan 9, 2009 · Hello all, Just wondering if someone can give me a brief explanation of Wood's anomaly with regards to optics. Many thanks!