Top Banner
Light Wave Properties of Light Reflection Refraction Diffraction Interference
31
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Page 1: Properties of light

Light

Wave Properties of LightReflectionRefractionDiffractionInterference

Page 2: Properties of light

Reflection

Reflectionwhen a wave strikes an object and bounces off

Page 3: Properties of light

Reflection

incident ray reflected rayNormal

Surface

Page 4: Properties of light

Reflection

Page 5: Properties of light

Reflection

incident ray reflected rayNormal

Surface

Page 6: Properties of light

ReflectionNormal-line perpendicular to the

reflecting surface.Incident ray/incoming ray-the ray

that hits the barrier/surface.Angle of incidence-angle formed

by the incident ray with the normal.

Page 7: Properties of light

Reflection

Angle of reflection-angle formed by the reflected ray with the normal.

Page 8: Properties of light

Reflection

incident ray reflected rayNormal

Surface

Page 9: Properties of light

Reflection

Law of Reflectionthe angle of incidence equals the angle of reflection

The incident ray, reflected ray and the normal lie on the same plane

Page 10: Properties of light

Fiber OpticsTotal Internal Reflection

•when all light is reflected back into the denser medium

Refraction

Page 11: Properties of light
Page 12: Properties of light

Refraction

Refractionbending of waves when passing from one medium to another

Page 13: Properties of light

Refraction

Refractioncaused by a change in speed

•slower (more dense) refracted ray bends toward the normal

•faster (less dense) refracted ray bends away from the normal

Page 14: Properties of light

Refraction

SLOWER

Page 15: Properties of light

Refraction

FASTER

Page 16: Properties of light
Page 17: Properties of light
Page 18: Properties of light
Page 19: Properties of light

Refraction

Rainbowsrefraction-reflection-refraction

Page 20: Properties of light
Page 21: Properties of light
Page 22: Properties of light

Diffraction

Diffraction

bending of waves around a barrier

depends on the wavelength and size of the opening barrier.

Page 23: Properties of light
Page 24: Properties of light

Diffraction Gratingsglass or plastic made up of many tiny parallel slits

may also be reflectivespectroscopes, reflective rainbow stickers, CD surfaces

Diffraction

Page 25: Properties of light
Page 26: Properties of light

Interference

When two waves meets, they have an effect with each other.constructive when the crest of one wave meet the crest of the other one

Page 27: Properties of light

Interference

destructive when the crest of one wave meet the trough of the other wave

Page 28: Properties of light

Interference

constructive brighter lightdestructive dimmer light

Page 29: Properties of light

Interference

Thin Films - Bubbles & Oil Slicksinterference results from double reflection

Page 30: Properties of light
Page 31: Properties of light