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Light waves

Light waves. Visible light. Only type of wave able to be detected by the human eye. Violet is the highest frequency light. Red light is the lowest frequency light. When all wavelengths of light are being absorbed we see black. Light Waves , ect.

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Light waves

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  1. Light waves

  2. Visible light • Only type of wave able to be detected by the human eye. • Violet is the highest frequency light. • Red light is the lowest frequency light.

  3. When all wavelengths of light are being absorbed we see black.

  4. Light Waves, ect. • Light is a form of energythattravels in waves. • Light waves can travelthroughspace. • There are otherwavesthatwecan’tsee: • …Infraredwaves, microwaves, x rays and radio waves • Infraredwaves are heatwaves • Microwaves can heat up foodlikepopcorn • X rays are usedto record imagesinsidethe human body

  5. Colours (colors) • Theamount of light anobjectreflectsdependsontheobject´ssurface. • A smoothsurface, likethat of a mirror, reflectsnearlyall of the light that strikes it. • Therest of the light is absorbed.

  6. Light and Colour • Light appearswhite. However, light is a mixture of differentwavelengths of light. • Each of thesewavelengths are seenbythe human eye as a differentcolour. • When light passesthrough a prism, itspathchanges, and thewhite light isseparatedintothecolours of the visible spectrum. • Thecolour of anobjectdependsonwhichwavelength of light theobjectreflects. • A carrot looks orangebecauseitreflectsorange light and absorbsotherwavelengths.

  7. Light • Reflection: isthebouncing of light off of a surface. You can seeyourreflection in a mirror.

  8. Light • Refraction: isthebending of light as itpassesfromone material toanother.

  9. Light • Diffraction: isthebending of light aroundanobject.

  10. Review

  11. Review

  12. Review

  13. Light • Transparent: Allowingalmostall light topassthrough.

  14. Light • Translucent: Allowingsome light topassthrough.

  15. Light • Opaque: Notallowingany light topassthrough.

  16. Light • Review:

  17. Light • Review:

  18. Light • Review:

  19. Theend!

  20. rainbows • We see rainbows when the sun is behind us and falling rain is in front of us. • -When sunlight strikes a falling drop of water it is refracted, changed indirection, by the surface of the water.The light continues into the drop and is reflected from the back of the drop to the front.  • When the beam hits the front it is refracted again and emerges from the drop as the color spectrum that we see in a rainbow. -The water drop acts like a prism to seperate the light into its different wave lengths.

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