Light

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refraction, reflection, absorption

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  • Light and its nature have caused a lot of ink to flow during these last decades. Its dual behavior is partly explained by (1)Double-slit experiment of Thomas Young - who represents the photon’s motion as a wave - and also by (2)the Photoelectric effect in which the photon is considered as a particle. A Revolution: SALEH THEORY solves this ambiguity and this difficulty presenting a three-dimensional trajectory for the photon's motion and a new formula to calculate its energy. More information on https://youtu.be/mLtpARXuMbM or https://www.slideshare.net/SalehTheory/saleh-theory?qid=fa70d6c2-03f4-43e1-8177-c710dd7b3b5f&v=&b=&from_search=1
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Light

  1. 1. LIGHT REFLECTION, REFRACTION, AND ABSORPTION
  2. 2. The way light waves bounce and bend show details of objects around us <ul><li>REFLECTION </li></ul><ul><ul><li>Bouncing waves </li></ul></ul><ul><ul><li>Like a ball bounces back </li></ul></ul><ul><li>REFRACTION </li></ul><ul><ul><li>bending waves </li></ul></ul><ul><ul><li>Do NOT bounce back </li></ul></ul><ul><ul><li>Helps us see </li></ul></ul><ul><ul><li>Makes the rainbow </li></ul></ul>
  3. 3. Not all waves bend or bounce, some stick <ul><li>ABSORPTION </li></ul><ul><ul><li>Light waves that get taken up or absorbed </li></ul></ul><ul><ul><li>Opaque objects you can not see through, like wood or wool, can absorb light waves </li></ul></ul><ul><ul><li>Absorption helps us see color </li></ul></ul>
  4. 4. 3 kinds of Mirrors reflect light waves <ul><li>PLANE </li></ul><ul><ul><li>Flat mirrors in our bathroom </li></ul></ul><ul><ul><li>Reflection is the same size </li></ul></ul><ul><li>CONVEX </li></ul><ul><ul><li>Not the same size </li></ul></ul><ul><ul><li>View is wider—you can see more </li></ul></ul><ul><ul><li>The mirrors on our cars </li></ul></ul><ul><li>CONCAVE </li></ul><ul><ul><li>Curved like a spoon </li></ul></ul><ul><ul><li>Can look upside-down, right-side up, smaller or bigger </li></ul></ul><ul><ul><li>Like a funhouse mirror </li></ul></ul>
  5. 5. Telescopes use mirrors to see far distances <ul><li>Telescopes </li></ul><ul><ul><li>Reflect or refract light </li></ul></ul><ul><ul><li>Use plane and concave mirrors </li></ul></ul><ul><ul><li>The bigger and more mirrors </li></ul></ul><ul><ul><ul><li>the larger the image </li></ul></ul></ul><ul><ul><ul><li>the further away to see </li></ul></ul></ul>
  6. 6. Why do things look different in the water? <ul><li>REFRACTION —bending light </li></ul><ul><li>Light travels through air very fast—faster than water </li></ul><ul><li>Light travels through water faster than through glass </li></ul><ul><li>As light goes through material it slows down and bends </li></ul>
  7. 7. In order to see, our eyes need to use refraction <ul><li>Our eyes focuses light to form and see objects </li></ul><ul><li>Light enters in a straight line </li></ul><ul><li>The lens bends the light rays and focuses in the retina to make images </li></ul>
  8. 8. Light is made of many colors— I can only see the visible spectrum. <ul><li>White light is made up of the colors of the rainbow. </li></ul><ul><li>Red bends the least </li></ul><ul><li>Violet bends the most </li></ul><ul><li>In order: red , orange , yellow, green , blue , indigo , violet </li></ul><ul><li>Other colors we see come from mixing the visible spectrum colors </li></ul>
  9. 9. The ABSORPTION of light is very important to how we see things. <ul><li>Objects with colors absorb some light and reflect others </li></ul><ul><li>The color of light the object reflects is the color we see </li></ul>
  10. 10. In summary, I have learned <ul><li>Light can be </li></ul><ul><ul><li>reflected (like in mirrors), </li></ul></ul><ul><ul><ul><li>Convex—made bigger </li></ul></ul></ul><ul><ul><ul><li>Concave—changes size , shape or direction </li></ul></ul></ul><ul><ul><li>refracted (by water) </li></ul></ul><ul><ul><ul><li>Makes it look like it doesn’t match up </li></ul></ul></ul><ul><ul><li>absorbed (by objects) </li></ul></ul><ul><ul><ul><li>Other colors taken in, color I see is reflected </li></ul></ul></ul><ul><li>I can see only the visible spectrum of colors from the rainbow—ROY G BIV </li></ul><ul><li>My eyes’ lenses use the refraction of light to see </li></ul><ul><li>Light travels slower through objects than air </li></ul><ul><li>Light travels very fast </li></ul><ul><li>Telescopes use plane and concave mirrors to see things far away </li></ul><ul><li>Light is like up and down waves </li></ul>
  11. 11. Manipulating Light by Darlene Stille <ul><li>Reflection—I see </li></ul><ul><li>Refraction—it bends </li></ul><ul><li>Absorption—goes into </li></ul><ul><li>By Darlene Stille </li></ul>

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