SC300 Unit Three Alissa Rennie AIM: alissarennie1

Agenda 1.Electromagnetic (EM) spectrum a.Microwaves b.Infrared waves c.Visible light waves 2.Energy research groups (Units 3-4) 3.Q&A

Electric field + magnetic field = electromagnetic waves

Cosmic microwave background: Full sky map of the universe

Microwaves Waves whose wavelengths range from about 1 meter to 1 millimeter. Used in satellites Aircraft Radar

Microwaves

Cell phones Mobile phone use is ubiquitous with an estimated 4.6 billion subscriptions globally. The electromagnetic fields produced by mobile phones are classified by the International Agency for Research on Cancer as possibly carcinogenic to humans. Studies are ongoing to more fully assess potential long- term effects of mobile phone use. WHO will conduct a formal risk assessment of all studied health outcomes from radiofrequency fields exposure by 2012

Infrared Waves

Visible Light Waves

Image credits: Microsoft Clip Art

Unit Four Groups BioEnergy Coal Geothermal Hydrogen Hydropower Nuclear Natural Gas Oil Solar Wind Unit Three work (this week): Collaborate, strategize, and divide up the work. Next Week (Unit Four): Make separate posts, being careful never to repeat. Comment on the suitability of other groups' energy sources. Debate the energy sources!