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Wave Polarization
Dandan JiEmre Kopanoglu
Andy Cai
Learning Objectives
• Revisit the concept of wave polarization and how to generate polarized waves from recap of reading assignments
• Analyze how polarized waves work in real-life applications from video demonstration and discussion
• Apply knowledge of polarization to lighting design in homework
Direction of propagation
A phenomenon peculiar to transverse waves.
Classification of Polarization
Video clip: http://www.youtube.com/watch?v=Fu-aYnRkUgg
Polarization
Absorption
achieved by
Natural light: random
Polarized light: confined in a plane
Polarization
Reflection
Natural light
θPθP
Polarization
Reflection
Polarization demonstration• Camera view on a LCD display, with a polarized
filter being rotated
Polarization demonstration• Group Discussion (3 min): – Why does the LCD display go completely dark
when the filter is rotated?– Why does not the background light get completely
filtered?
LCD displays/projectors
• Millions of liquid crystal cells!– Adjust light
LCD displays/projectors• Adjust light
• Adjust color