Science please answer?

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what is the wavelength and frequency if the wavelengthis4.5x10-7 Show wok please

You have already stated the frequency. Are you talking about light? What are the units of wavelength? meters? cm? feet/

frequency = (wave speed)/(wavelength)

You can do the numbers. Make sure the dimensions are consistent.

sorry don't know

  • Astronomy -

    Light is gathered from a distant galaxy and one of the spectral lines is observed at 500 nm when it should be 400 nm. The velocity of this galaxy is _____ km/s.

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