domingo, 15 de agosto de 2010

Invisible Light

Introductions
Are many types of invisible light.
The invisible light start in:
Radio Waves, Microwaves,
Infrared Light,Utraviolet Light,
X Rays , Gamma Rays.
The little one is the radio waves
and hardlest is gamma rays.

  1. RADIO WAVES:radio waves are the longest waves of  the electromagnetic spectrum, broadcast stations use them to carry signals in a kind of code AM or FM.



2.MICROWAVES:microwaves are shortwave radio waves.microwave ovens can heat many  foods faster , using less enrgy tha a regular oven.










3.INFRARED LIGHT:infrared light means "just beyond red ." All objects give off more infrared waves , depending on their temperature.










4.ULTRAVIOLET LIGHT:ultraviolet(UV)light is made up of waves just shorter than visible  violet light  on the spectrum.






5.X RAYS: x rays can pass right through most objects.Thicker or denser objects tend  to absorb x rays.









6.GAMMA RAYS: the shortest wavelengths of the spectrum-gamma rays.




Light an Lenses

  1. opaque: completely blocking  light from passing through.






2.transparent: letting all light through , so that objects on the other side can be seen clearly.







3.translucent : letting only some through, so that objects on the other side appear blurry.









4.polarization: allowing light vibrations to passthrough in only one direction.




5.refraction: the bending of light rays as they pass from one subtance into another.








6.convex lens: a lens that curves outward (is thicker at the middle than at the edges) and brings light rays together.






7.concave lens : a  lens that curves inward ( is thicker at the edges than at the middle) and speads light rays apart.

viernes, 13 de agosto de 2010

Light and Lenses

  1. opaque:completely  blocking  light  from   passing  through.






2.  transparrent:letting  all  light  through, so  that  objects  on  the  other  side  can  be seen clearly.








3.translucent:letting  only  some  light  through, so  that  objects  on the other side  appear blurry.









4.polarization:allowing  light  vibrations  to  pass  through  in  only  one  direction.




5.refraction:the  bending  of  light  rays  as  they  pass  from  one  subtance into  another.