The Doppler Effect with Light (Grade 12 NSC Matric Physical Sciences): Flashcards

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The Doppler Effect with Light
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Speed of light in vacuum

3.00imes1083.00 imes 10^8 m/s

Wave equation for light

c=flambdac = flambda

Redshift wavelength change

Longer wavelengths (lower frequency)

Blueshift wavelength change

Shorter wavelengths (higher frequency)

Cause of redshift

Light source moving away from observer

Cause of blueshift

Light source moving towards observer

Hubble's law formula

v=H0×dv = H_0 \times d

Hubble constant value

67.1567.15 km/s/Mpc

Why most galaxies show redshift

Universe expanding; space itself stretches

Spectral lines definition

Specific wavelengths elements emit or absorb

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