1. Mr. Jackson 5-3-12

2.  Light is an EM wave (not requiring a medium)  EM waves are produced by radiation which is the transfer of energy in the form of a wave

3.  The Speed of Sound was 343m/sec  The speed of light is 300,000,000m/sec  This is 880,000 times faster than the speed of sound  If you could run at the speed of light you could circumnavigate the earth 7.5 times per second  It takes 8.3 min for the sun to transmit light to the earth

4.  The entire range of EM waves is called the EM spectrum

5.  Longest Wavelength (over 30 cm)  FM and AM radio and analog television signals are broadcast using Radio waves

6.  Wavelength between 1mm and 30 cm  Microwave ovens, Cell Phones and Radar( Used to detect speed of a car) use microwaves.

7.  Used to detect heat  Military and Fire  Kitchens to keep food Hot  IR thermometer

8.  The only part of the EM Spectrum you can see.  The colors are Red, Orange, Yellow, Green, Blue, Indigo, Violet  Roy G. Biv

9.  More violet than violet (Ultra Purple)  Commonly known as UV  Tanning beds, black light, ect.  UV CAUSES CANCER!!!  UV Causes sunburn  UV does allow the body to utilize vitamin D

10.  Will pass through many materials  Used in medical diagnostics  Used for security devices in airports ect.

11.  Have the shortest wavelength  Penetrate most materials easily  Used for radiation treatment for cancer  Also used to kill harmful bacteria in food

12.  Light waves can be reflected by using a mirror  The law of reflection states that the angle of incidence is equal to the angle of reflection  Incidence is the arrival of a beam of light at a surface

13.  Objects that produce visible light are called luminous  Objects that are visible but do not produce light are called illuminated

14.  When light becomes dimmer while traveling through a medium such as air is Absorption  Scattering is where light becomes dimmer due to the particles of light spreading out

15.  Refraction of light is the bending of light  This process occurs because light travels slower through solids and liquids than it does air  Refraction will separate visible light into the 7 primary colors by using a prism

16.  A Transparent object allows light to be transmitted through the object (Glass)  A Translucent object transmits light but not an image ( Wax Paper)  An opaque object will not transmit light or an image

17.  Red, Blue and Green are the Primary colors of light.  When the colors of light combine they undergo color addition which produce the secondary colors of light which are Magenta, Cyan, and Yellow  Television screens produce the colors Red, Blue and Green. New Televisions with 3-D Technology and LED Technology use Yellow in the pixels to produce more vibrant color schemes  When all the Primary colors mix they produce White light

18.  The primary pigments are Yellow, Magenta, and Cyan and by the process of color subtraction they produce the Primary Colors of light  When they all mix together they produce Black

19.  A plane mirror has a flat surface. Images appear the same size but are reversed right to left  Concave Mirror makes objects appear smaller shaped like the inside of a spoon  Convex Mirror Makes objects appear larger shaped like the back of a spoon

20.  A lens is a transparent object that refracts light  Convex Lenses is thick in the middle and narrow on the edge. Used in magnifying lenses and in cameras  Concave Lenses are thin in the middle and thick on the edges. Used in eyeglasses and microscopes

21.  Nearsightedness is a condition where they eye is too long. These people see things up close but not far away  Farsightedness is there the eye is too short. These people can see far away but not up close  Color Blindness where the cones that receive color do not function properly

22.  Lasik is a surgical procedure where laser is used to reshape the lens of the eye. It is minimally invasive although the cornea is cut.  PRK is a surgical procedure that is used to reshape the lens. In this procedure the cornea is burned away by a laser and the recovery is longer however the correction tends to last longer

23.  Produces intense light of only 1 wavelength and color. The waves in a laser behave as 1 wave

24.  Thin glass tubes that transmit light.  Used for data and voice communication also used for video  Light in a pipe

25.  Polarized light is light that has passed through a filter and only 1 plane of the light is allowed to pass.