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Ch. 13 – Light II. Wave Properties of Light (p. 384 – 388) Reflection Refraction Diffraction Interference.

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Presentation on theme: "Ch. 13 – Light II. Wave Properties of Light (p. 384 – 388) Reflection Refraction Diffraction Interference."— Presentation transcript:

1 Ch. 13 – Light II. Wave Properties of Light (p. 384 – 388) Reflection Refraction Diffraction Interference

2 A. Reflection Reflection when a wave strikes an object and bounces off incident beamreflected beam Normal

3 A. Reflection Law of Reflection the angle of incidence equals the angle of reflection

4 B. Refraction Refraction bending of waves when passing from one medium to another caused by a change in speed slower (more dense) light bends toward the normal SLOWER FASTER faster (less dense) light bends away from the normal

5 B. Refraction Refraction depends on… speed of light in the medium wavelength of the light – shorter wavelengths (blue) bend more

6 B. Refraction Example:

7 C. Diffraction Diffraction bending of waves around a barrier longer wavelengths (red) bend more – opposite of refraction

8 D. Interference Interference constructive brighter light destructive dimmer light

9 E. Cool Applications! Fiber Optics Total Internal Reflection when all light is reflected back into the denser medium

10 E. Cool Applications! The Broken Pencil refraction View animation and explanation of the Broken Pencil.animation and explanation of the Broken Pencil.

11 E. Cool Applications! Rainbows refraction-reflection-refraction

12 E. Cool Applications! Diffraction Gratings glass or plastic made up of many tiny parallel slits may also be reflective spectroscopes, reflective rainbow stickers, CD surfaces

13 E. Cool Applications! Thin Films – Bubbles & Oil Slicks interference results from double reflection

14 E. Cool Applications! Blue Sky & Red Sunsets NOON less atmosphere less scattering blue sky, yellow sun SUNSET more atmosphere more scattering orange-red sky & sun Molecules in atmosphere scatter light rays Shorter wavelengths (blue, violet) are scattered more easily


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