Diffraction and the Wave Model

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Presentation transcript:

Diffraction and the Wave Model Observation: Shadows do not have sharp edges Conclusion: Diffraction – light bends as it passes the edge of a barrier

Polarization of Light Unpolarized Light – light waves that are oscillating in all directions Polarized Light – light waves that are oscillating in only one direction

Polarization of Light

Doppler Effect and Light Astronomers can determine how objects (such as galaxies) are moving based on emission spectra “Red shift” – longer wavelengths are observed “Blue shift” – shorter wavelengths are observed

Observed Light Frequency 𝑓 𝑜𝑏𝑠 =𝑓 1± 𝑣 𝑐 + if the objects are moving toward each other - if the objects are moving away from each other Doppler Shift λ 𝑜𝑏𝑠 −λ = ±( 𝑣 𝑐 )λ

Physics Book p455 #16-28