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REFRACTION - PRISM

REFRACTION - PRISM. 1. Shine laser incident to side of prism. 70. Incident Ray. 55. 55. 2. Draw normal (90. to prism where incident ray hits side. ). 70. 3. Measure angle. i. Normal. i. Incident Ray. 55. 55. 4. Calculate. r'. Use. Snell's Law n sin = n sin. r. '. i.

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REFRACTION - PRISM

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  1. REFRACTION - PRISM

  2. 1. Shine laser incident to side of prism 70 Incident Ray 55 55

  3. 2. Draw normal (90 to prism where incident ray hits side ) 70 3. Measure angle i Normal i Incident Ray 55 55

  4. 4. Calculate r' Use Snell's Law n sin = n sin r ' i Air Prism 1.45 sin 1.00 sin = r ' = r'

  5. r' 5. Measure with respect to the normal as shown Extend line until it meets side of prism 70 Normal i Incident Ray r' 55 55

  6. 6. Draw normal (90 to where extended line meets side) 70 ' 7. Measure i Normal Normal i Incident Ray r' ' i 55 55

  7. Calculate 8. r Use Snell's Law n sin = n sin ' r i Air Prism = 1.45 sin 1.0 sin r = r

  8. r 9. Measure with respect to the normal as shown This is the refracted ray 70 apex angle Normal Normal i r Incident Ray ' r' i Refracted Ray 55 55

  9. r Compare measured to theoretical r Snell's Law n sin = n sin i r Physics Physics Geometry Air Prism Internal Air Prism n sin = n sin n sin = n sin ' r' r' i i + (180 - apex angle) + = 180 i' r 1.0 sin = 1.45 sin = 50 1.45 sin 1.0 sin r' or 38.11 r r r r (90 - ) + apex angle + (90 - ) = 180 i' r' 31.89 + (180 - 70) + = 180 or (90 - 31.89) + 70 + (90 - ) = 180 i' i' = r' 63.50 = 31.89 r = 38.11 i' % deviation = ABS ((63.5 - )/63.5) * 100

  10. Find the Refracted Ray 70 Incident Ray 55 55

  11. 3. = 60 2. 1 sin 60 = 1.45 sin = 36.67 r' 1. i' =35 4. 1.45 sin 35 = 1 sin = 56.27 i r r' r 70 Normal Normal i r i' r' Incident Ray Refracted Ray 55 55

  12. r Compare measured to theoretical r Snell's Law n sin = n sin i r Physics Physics Geometry Air Prism Internal Air Prism n sin = n sin n sin = n sin ' r' r' i i + (180 - apex angle) + = 180 i' r 1.0 sin = 1.45 sin 60 = 1.45 sin 1.0 sin 33.33 r' or r r r r (90 - ) + apex angle + (90 - ) = 180 i' r' 36.67 + (180 - 70) + = 180 or (90 - 36.67) + 70 + (90 - ) = 180 i' i' = r' 36.67 = 52.82 r = 33.33 i' % deviation = ABS ((52.82 - 56.27)/52.82) * 100 6.5 %

  13. Find the refracted ray 70 Incident Ray 55 55

  14. 1. 3. = 45 i' i = 42 2. 1 sin 45 = 1.45 4. 1.45 sin 42 = 1 sin r sin r' r' r =29.19 = 75.99 70 Normal Normal i Incident Ray r' i' r Refracted Ray 55 55

  15. r Compare measured to theoretical r Snell's Law n sin = n sin i r Physics Physics Geometry Air Prism Internal Air Prism n sin = n sin n sin = n sin ' r' r' i i + (180 - apex angle) + = 180 i' r 1.0 sin = 1.45 sin 45 = 1.45 sin 40.81 1.0 sin r' or r r r r (90 - ) + apex angle + (90 - ) = 180 i' r' 29.19 + (180 - 70) + = 180 or (90 - 29.19) + 70 + (90 - ) = 180 i' i' = r' 71.38 = 29.19 r = 40.81 i' % deviation = ABS ((71.38 - 75.99)/71.38) * 100 6.5 %

  16. REFRACTION - PRISM KS MARCH 2008

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