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Light Reflection and Refraction

Light Reflection and Refraction. Reflection. Law of Reflection. Law of Reflection. “normal” line. Q i. Q r. The angle of incidence, Q i, is equal to the angle of reflection, Q r. Q i = Q r. 1. Incident ray of light 2. Reflected ray of light 3. Backward Extension Lines

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Light Reflection and Refraction

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  1. Light Reflection and Refraction

  2. Reflection • Law of Reflection

  3. Law of Reflection “normal” line Qi Qr The angle of incidence, Qi, is equal to the angle of reflection, Qr. Qi = Qr

  4. 1.Incident ray of light 2. Reflected ray of light 3. Backward Extension Lines Lines extended backward from the reflected rays of light

  5. Plane (Flat) Mirrors

  6. Curved Mirrors • “Objects in Mirror are Closer than they Appear!”… Why?

  7. Curved Mirrors • Or Not!

  8. Refraction • Angle of Refraction • Optical Density

  9. Refraction • Snell’s Law • the ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant • ni sini = nr sinr • Index of Refraction • nsubstance = c / vsubstance

  10. Dispersion of Light • Dispersion • the separation of light into the spectrum

  11. Dispersion of Light • Water droplets act as lenses causing a dispersion of light, this light then reflects off of the back of the droplet

  12. Homework! Read 29.1 – 29.5

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