The Electromagnetic Spectrum 6 October 2014

Light Absorption, Reflection, and Refraction Review: Video

-notes must be written neatly -letters should not be too BIG! -write on each line, unless instructed to skip a line for another section -have a puke page on standby: if you run out of room on the first page, then continue writing on the puke page (glue after the presentation!) Note- Taking Expectations

Your notes should contain the following at the top of page 21: -The essential question -The date (international style) and page # -The title (Electromagnetic Spectrum) Top of the Page

Skip 1 line underneath the title Here we go!

Electromagnetic Waves: waves of light

Electromagnetic Waves: waves of light; some are visible or invisible

Electromagnetic Waves: waves of light; some are visible or invisible; they are made by vibrating electric charges and can travel through a medium or open space

With your group, answer the following question: Electromagnetic Waves are an example of what type of wave? You have 20 seconds! BRAIN BREAK!

With your group, answer the following question: Electromagnetic Waves are an example of what type of wave? You have 20 seconds! Transverse Waves *write this to the right of the definition of electromagnetic waves* BRAIN BREAK!

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Frequency: frequency of electromagnetic waves is the # of waves per second (Hz)

With your group, come up with a good mathematical formula that represents frequency. You have 30 seconds! BRAIN BREAK!

With your group, come up with a good mathematical formula that represents frequency. You have 30 seconds! F = # of waves time *write the formula to the right of the definition of frequency* BRAIN BREAK!

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The Electromagnetic Spectrum: all the different frequencies of light

Skip 2 lines and write The Electromagnetic Spectrum Includes: on the 3rd line

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→ Radio Waves: low frequency waves with wavelengths of 1-10 cm

→ Radio Waves: low frequency waves with wavelengths of 1-10 cm; have the longest wavelengths

(ex: radio stations, microwaves, radar)

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→ Infrared Waves: slightly higher frequency waves than radio waves

(ex: remote controls, warmth of fire, satellites)

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→ Visible Light Waves: range of waves that humans can see

→ Visible Light Waves: range of waves that humans can see; each different wavelength is seen as a different color

With your group, come up with a good example of visible light. You have 20 seconds! BRAIN BREAK!

With your group, come up with a good example of visible light. You have 20 seconds! ROY G BIV BRAIN BREAK!

→ Visible Light Waves: range of waves that humans can see; each different wavelength is seen as a different color (ex: ROY G BIV)

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→ Ultraviolet (UV) Waves: frequencies slightly higher than visible light;

→ Ultraviolet (UV) Waves: frequencies slightly higher than visible light; wavelengths are too short for humans to see

→ Ultraviolet (UV) Waves: frequencies slightly higher than visible light; wavelengths are too short for humans to see (ex: sunburns, vitamin D production, kills bacteria, cataracts, cancer)

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→ X-Ray Waves: even higher frequencies that can get into your body

→ X-Ray Waves: even higher frequencies that can get into your body; they are absorbed by bone

(ex: medical x-rays)

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→ Gamma Ray Waves: highest frequency waves with the shortest wavelengths;

→ Gamma Ray Waves: highest frequency waves with the shortest wavelengths; can travel through matter; will damage cells

(ex: medical bone imaging, causes cancer, used to kill cancer cells)

-highlight in yellow electromagnetic waves, frequency, electromagnetic spectrum -underline in red the different parts of the EMS and their examples -circle in blue the 1) the type of wave that light is 2) the formula for frequency Note Review

-draw a green box around the different examples of the Electromagnetic Spectrum Note Review