Reflection and refraction

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What 4 things could happen when a wave hits a boundary of a different material?

  • It can be transmitted straight through

  • The energy can be absorbed and it won’t transmitted

  • It can be reflected

  • It can refract

2
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Give the method for the reflecting and refracting required practical

  1. Take a piece of paper and draw a straight line down the centre

  2. Use a protractor to the line at a right angle. Label this the normal

  3. Place a glass block against the first line so that the normal is near the centre of it.

  4. Draw a line around the perimeter or the glass block and turn off all the lights.

  5. Use a raybox to direct a ray of light so it hits the block at the normal

  6. At a certain angle we will be able to see a ray being reflected off the box and one being transmitted through. Draw all these lines

  7. Use a protractor to measure all the important angles

  8. Repeat the entire experiment with blocks of different materials

<ol><li><p>Take a piece of paper and draw a straight line down the centre </p></li><li><p>Use a protractor to the line at a right angle. Label this the normal</p></li><li><p>Place a glass block against the first line so that the normal is near the centre of it.</p></li><li><p>Draw a line around the perimeter or the glass block and turn off all the lights.</p></li><li><p>Use a raybox to direct a ray of light so it hits the block at the normal</p></li><li><p>At a certain angle we will be able to see a ray being reflected off the box and one being transmitted through. Draw all these lines</p></li><li><p>Use a protractor to measure all the important angles</p></li><li><p>Repeat the entire experiment with blocks of different materials </p></li></ol><p></p>
3
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What will be the results?

The angles of incidence and the angle of reflection should be the same for whatever material.

The angles of refraction will be different depending on the material.

4
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Angle of incidence =

Angle or reflection