DVDS Web Results

Some questions about humidity and storing DVDs in a closed cardboard ... This discussion centers on the effects of humidity on storing DVDs and electronic components in closed cardboard boxes. It highlights that moisture can enter these containers during humid weather, and questions whether transitioning to a hot and dry climate (31-35°C) will evaporate the moisture from the items inside.

Question about plastic bags and humidity • Physics Forums Additionally, it was noted that DVDs are classified as MSL-1, meaning they are not significantly harmed by humidity. Recommendations included using airtight vacuum storage bags and desiccant packs to ensure dryness.

Why is there a spectrum on the back of a CD or DVD? 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 around the edges of these microscopic structures, leading to the overlapping of various colors in a continuous spectrum. The discussion confirms that the correct explanation for this visual effect is indeed ...

The Many Faces of Topology - Physics Forums 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 topology.

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).

Standard Rf Values - Biology (Photosynthesis) - Physics Forums 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 pigments via Paper Chromatography, and I'd like to compare my results to the standards. The problem is...

COMSOL Student Copy: Free Academic License • Physics Forums 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, specifically regarding posting questions in designated areas. Users are encouraged to utilize search engines to find additional resources related to the COMSOL Student Copy. The conversation highlights the need for ...

Why Do Longer Wavelengths Go Slower in Glass? - Physics Forums The discussion centers on the phenomenon of light refraction in glass, specifically addressing why longer wavelengths travel slower than shorter wavelengths. Participants clarify that this behavior is attributed to the material properties of the prism rather than gravitational effects, which are wavelength-independent. Richard Feynman's classical explanations of light and refraction are ...

Understanding the Differences between Euler Versus Tait Angles The discussion centers on the differences between Euler angles and Tait-Bryan angles in the context of rotational motion. Tait-Bryan angles represent rotations about three distinct axes (yaw, pitch, roll), while Euler angles utilize the same axis for both the first and third rotations (precession, nutation, spin). It is established that Euler angles are commonly preferred in mechanical ...

Calculating the percent composition of weight of an alloy The discussion focuses on calculating the percent composition of weight in an alloy, specifically involving carbon and iron. Key parameters include the densities of iron (ρ_fe = 7.87 g/cm³) and carbon (ρ_c = 2.26 g/cm³), along with their respective atom densities (N_fe = 8.48e22 cm⁻³, N_c = 1.13e23 cm⁻³). The user seeks clarification on using the gram atomic weight of the alloy and ...