DO NOW: HW WORKBOOK AND SIDE BENCH WITH YOUR NAME STICK!
ESSENTIAL QUESTION: What are some of the consequences and/or
applications of the Doppler Effect? HOMEWORK: Read and make NOTES
on 2pt Interference patterns and Youngs Equation
The Speed of Sound and Beyond! V sound = 332 + 0.6T where T is
temperature in Celsius
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Remember this?
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What about light? If light is a wave, then light should show
Doppler effects too!
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The spectral lines in light from distant galaxies were shifted
towards the red end of the spectrum. 1923 Edwin Hubble concluded
that this shift was caused by the Doppler Effect which indicated
that distant galaxies are moving away from the earth at high
speeds. The farther away the galaxy, the higher its speed. Redshift
of spectral lines in the supercluster of distant galaxies (right),
as compared with that of the Sun (left). Wavelength increases up
towards the red and beyond (frequency decreases).
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But not just light . - all electromagnetic radiation Doppler
shifts! Doppler Radar - traffic tickets and weather watching
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So is there a Sound Barrier equivalent for light? What
happenswhen an objecttravelling near thespeed of light,then turns
on itsheadlights?
Slide 18
KWL Chart Evidence for the Big Bang: What do I already KNOW
What do I WANT to know? What I have learned: