physics of light l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Physics of Light PowerPoint Presentation
Download Presentation
Physics of Light

Loading in 2 Seconds...

play fullscreen
1 / 11

Physics of Light - PowerPoint PPT Presentation


  • 165 Views
  • Uploaded on

Physics of Light. Kristen Halls 5/7/09. What is Light?. Does not need medium to travel through Consists of energy in the form of electric and magnetic fields Known as electromagnetic radiation. Light Waves . Come in many different sizes (size of wave measured in wave lengths)

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Physics of Light' - duer


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
physics of light

Physics of Light

Kristen Halls

5/7/09

slide2

What is Light?

Does not need medium to travel through

Consists of energy in the form of electric and magnetic fields

Known as electromagnetic radiation

slide3

Light Waves

Come in many different sizes

(size of wave measured in wave lengths)

Come in many different frequencies

(# of waves that pass a point in space during a time interval)

Measured in Hertz (Hz)

slide4

Visible Light (aka Color)

Ranges from 430 trillion Hz, seen as red, to 750 trillion Hz, seen as violet

Violet has the most energy while red has the least

slide5

White Light?

When you look at the visible light of the sun, it appears white. But white isn’t a color!

Why?

Because white light is made up of many color frequencies.

Rainbows show us this!

slide6

Making Colors

What happens when you mix different colors of light?

slide7

Our Results

Primary Colors of Light:

Red, Green and Blue

slide8

Why is the sky blue?

When sunlight enters atmosphere, it collides with the oxygen and nitrogen atoms.

The colors with the shorter wavelengths are scattered more by this collision

Violet and blue are the shortest wavelengths but our eyes are more sensitive to blue light so we a blue sky

slide9

But then why are sunsets red?

Sunsets are reddish because the sun is not directly overhead

Rays must cross through much more atmosphere

After having crossed so much air, most of the blue light is scattered out, as well as most of the green. This leaves the red, yellow and orange colors

slide10

Take a look over this comic when you are finished with your lab and think about what the correct answers are to Calvin’s (the little boy’s) questions.

slide11

Information Credits

http://www.physlink.com/Education/AskExperts/ae228.cfm

http://www.why-is-the-sky-blue.tv/why-is-the-sky-blue.htm

http://science.howstuffworks.com/sky1.htm

http://science.howstuffworks.com/light14.htm

Photo Credits

http://www.faqs.org/photo-dict/photofiles/list/699/1110prism.jpg

http://en.wikipedia.org/wiki/File:Cloud_in_the_sunlight.jpg

http://cmb.physics.wisc.edu/tutorial/Hubble_Expansion/doppler.gif

http://www.windows.ucar.edu/physical_science/magnetism/images/visible_spectrum_waves_big.jpg

http://farm4.static.flickr.com/3171/3114871924_3abf540863.jpg

http://www.partyandpaperwarehouse.com/media/cellowrap.jpg

http://www.lakewoodconferences.com/direct/dbimage/50276506/27_LED_Flashlight.jpg

http://www.sweethaven02.com/Photog01/fig1201.gif

http://science.howstuffworks.com/sky.htm

http://optics.kulgun.net/Blue-Sky/red-sunset-casey1.jpghttp://everwhat.wikispaces.com/file/view/Sun_Set-Calvin_&_Hobbes.gif