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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).

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Some questions about humidity and storing DVDs in a closed cardboard ... If I have a dvd disk inside those plastic boxes suitable for dvd disks in black, if I have an electronic board inside a bag or papers inside any plastic bag and after that all of them inside a closed cardboard box when I closed the cardboard box or bag or dvdbox it was in rainy or humid weather...

Kinematics equations: Prove that a=vdv/ds • Physics Forums We know that v=v (x, t) i.e. V is a function of time as well as space coordinate here I have only taken 1D motion for simplicity. By chain rule a=dv/dt=...

Collection of Lame Jokes | Page 787 • Physics Forums The discussion revolves around sharing and enjoying "lame" jokes, with participants contributing various puns and one-liners. Jokes include classic setups like "A duck walks into a pharmacy..." and "Why did the chicken cross the road?" along with playful wordplay, such as "What do you call a boomerang that doesn't work? A stick." The humor is characterized by its groan-inducing quality, with ...

ChatGPT Examples, Good and Bad | Page 14 • Physics Forums The German translation is by far more colorful: Licking (s.o.) saliva or creeping (in s.o.) a** Of course, we use only one noun for the whole phrase. I often hear people mocking the German property of concatenating words into a new one. Well, since I used grammar to correct my English, I saw...

Maryborough meteorite • Physics Forums The Maryborough meteorite, discovered in May 2015 by a gold prospector near Maryborough, Victoria, is an H5 ordinary chondrite weighing 17 kg and measuring approximately 39 × 14 × 14 cm. Initially mistaken for gold, it was identified by Museums Victoria geologists as a meteorite after thorough analysis. This meteorite is significant as it is one of only two confirmed meteorites examined by a ...

Why is there a spectrum on the back of a CD or DVD? Homework Statement When i see the back of a CD or DVD, there is a spectrum, in which the various colours are overlapping with each other (continuous...

About Member The Bill • Physics Forums This is the profile for member The Bill. This page shows details about The Bill like postings stats, blog posts, latest posts, trophies won and interests. If you want to follow or message this user you must register an account.

Understanding Wood's Anomaly in Optics • Physics Forums Hello all, Just wondering if someone can give me a brief explanation of Wood's anomaly with regards to optics. Many thanks!