Do Cell Phones Cause Brain Tumors?

It's a fair question! And I wouldn't draw a conclusion too quickly. Because if cell phone radiation does cause cancer, a whole lot of us are in trouble. Join Derek Mueller of the Veritasium YouTube channel as he "takes it to the streets" and dissects the various studies and possible means by which this question can be reliably answered. Join Derek at ... 

https://www.youtube.com/watch?v=wU5XkhUGzBs

And for the teachers among us: why not make plans to present the question to your classes using the Science Reasoning passage present at our website that is titled Cell Phone Radiation. The passage presents both sides of the question to students and challenges them to analyze the arguments and draw some conclusions.

http://www.physicsclassroom.com/reasoning/light

We recommend that you challenge your students to the Reading Passage first and then use the Veritasium video as the follow-up.

Electromagnetic Spectrum - The Ultimate Infographic

One of our all-time favorite posts is this post about the EM Spectrum infographic. And from time to time, we repost it here on our social media sites. Nearly every high school physics course has a unit on the topic of light. And a central part of that unit is the behavior of light as a wave - an electromagnetic wave. A centerpiece of this discussion is usually a graphic showing the electromagnetic (EM) spectrum. The entire spectrum is divided into regions with popular names such as X-ray region, ultraviolet region, visible light region, infrared region, microwave region, etc. The most elaborate representation of the spectrum can be found on Flickr at 

https://www.flickr.com/photos/llnl/9403051123/sizes/l/

The infographic portrays the various regions, their wavelengths and frequencies, the characteristics and uses, the source and origin, and so much more. There is enough physics in this graphic to fuel several weeks’ worth of studies.

Finally, if you would like to see the infographic come alive, visit the interactive version of it at the Physics Interactives section of our website.

http://www.physicsclassroom.com/Physics-Interactives/Light-and-Color/Electromagnetic-Spectrum

Electromagnetic Spectrum Interactive

The Electromagnetic Spectrum Interactive Infographic is full of information about electromagnetic waves. There's so much to explore and digest that it will take several sittings before you're satisfied. And even then, you're likely to return for more. Originally created in 1944 as a wall-sized poster distributed by the W.M. Welch Scientific Company (a scientific supply house that has sinced closed its doors). This timeless piece of science and art is now available as an interactive app that allows learners to tap and explore its many layers of information.

https://www.physicsclassroom.com/Physics-Interactives/Light-and-Color/Electromagnetic-Spectrum