Right AWAY! Please pick up a colored piece of paper from table 4 and bring it back to your table with your lab journal. Next be sure that you have at least 4 colored pencils to work with today at your table.

Electromagnetic Waves Spectrum Foldable Please get your notebook and add this title to the next available page Click below for short NASA video

Fold on the solid line. Cut along the dashed lines.

outside flaps Radiowaves Microwaves Infrared Rays Visible Light Ultraviolet Rays X-rays Gamma Rays

Sketch a model of the Electromagnetic This is also in the class reading

Electromagnetic Spectrum The full range of frequencies, from radio waves to gamma rays, that characterizes lightfrequencies The electromagnetic spectrum can be expressed in terms of energy, wavelength, or frequency. Each way of thinking about the EM spectrum is related to the others in a precise mathematical way.electromagnetic spectrum

Wavelength and Frequency important vocabulary For any kind of wave there exists a simple relationship between wavelength and frequency. The wavelength (a) is measured as the distance between two successive crests in a wave. The frequency is the number of wave crests that pass a given point in space each second. (b has a higher frequency that a)

Gamma Rays Shortest wavelengths Highest frequencies Most penetrating of all waves

X-rays Can penetrate most matter Too much exposure can cause cancer Useful in medicine

Ultraviolet Rays Energy is great enough to damage or kill living cells Insects can see this Images of a Mimulus flower in visible light (left) and ultraviolet light (right) showing a dark nectar guide that is visible to bees but not to humans

Visible Light We can see it! White light can be separated into red, orange, yellow, green, blue, and violet Click on prism for short video

Infrared Rays Wavelengths are shorter than radiowaves We feel them as heat Ex: heat lamps and infrared cameras

Microwaves Radiowaves with the shortest wavelengths and highest frequencies Ex: radar guns

Radiowaves Longest wavelengths Lowest frequencies Used in broadcasting Click on icon below for short video