Friday, 25 February 2011

5CH - Ray diagrams

Applied the refraction formula to drawing/completing ray diagrams today. You can use the refractive index formula along with the knowledge that the angles in a triangle add up to 180 degrees to figure out how light will pass through most objects.

Sometimes we will have to consider the critical angle when completing ray diagrams. If the angle of incidence is greater than the critical angle then the light will reflect. The angle of reflection in these cases is equal to the angle of incidence.

Note: The more observant will spot my mistake with the angles. They should be 54 and 36 not 34 and 56. Final answer is still correct.

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