Some questions about humidity and storing DVDs in a closed …
Jul 21, 2023 · The discussion revolves around the effects of humidity on storing DVDs and electronic components in closed cardboard boxes, particularly during transitions between humid and dry …
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 will travel a …
Why is there a spectrum on the back of a CD or DVD?
Sep 22, 2011 · The spectrum observed on the back of a CD or DVD is a result of diffraction, where the tracks and sectors on the disc act as a diffraction grating. This phenomenon occurs when light bends …
The Many Faces of Topology - Physics Forums
Dec 17, 2024 · Topology is a branch of mathematics that encompasses many different parts. It is sometimes even difficult to see what these branches have in common or why they are all called …
Kinematics equations: Prove that a=vdv/ds • Physics Forums
Dec 1, 2019 · The discussion revolves around the kinematics equation a = v dv/ds, focusing on the relationship between acceleration, velocity, and displacement in one-dimensional motion. …
THERMO Spoken Here - Presented by Physics Forums
Free engineering thermodynamics textbook: Newton's mechanics, calculus, vectors, and 250+ solved physics problems.
Standard Rf Values - Biology (Photosynthesis) - Physics Forums
Mar 23, 2006 · Would anyone happen to know where I could find the standard Rf values (for Chlorophyll a, Chlorophyll b, Xanthophyll, and Carotene) if varsol is the solvent? I'm trying to identify those plant …
Is mathematics invented or discovered? - Physics Forums
Jan 22, 2026 · The discussion revolves around the philosophical question of whether mathematics is invented or discovered. Participants explore various perspectives on the nature of mathematical …
Pressure-Volume Work • Physics Forums
Jan 22, 2026 · The discussion revolves around the concept of pressure-volume work in a thermodynamic system involving a gas in a rigid cylinder with a piston. Participants explore the …
COMSOL Student Copy: Free Academic License • Physics Forums
Apr 2, 2015 · Hello, The discussion revolves around the COMSOL Student Copy, which provides a free academic license for students. Participants emphasize the importance of adhering to forum rules, …