Examples of waves Electromagnetic waves
Polarization of Electric & Magnetic Fields Polaroids The intensity of light waves can be diminished by using a polarizing filter (“polaroid”). Long-chain molecules absorb the electric field in the direction parallel to the chain. “Crossed” polarizers block light:
Polarization
Polarization of Electric & Magnetic Fields Reflection It turns out that reflection of light from a surface can also cause light to be polarized. Brewster’s angle is that angle at which all reflected light is polarized parallel to the surface of reflection.
The Electromagnetic Spectrum Visible light makes up a very small portion of the measured electromagnetic spectrum.
IR link: http://www.youtube.com/watch?v=-3uaTyNWcBI
Specular Reflection Diffuse Reflection
Types of refraction From low n to high n (air to water) From high n to low n (water to air)
Mirage (inferior)
Mirage (superior)
dispersion in water droplets! Color and Dispersion Rainbows arise due to dispersion in water droplets!