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chemistry

calculate the wavelength (in nm) of the red light emitted by a neon sign with a frequency of 4.74 x 10^14 Hz. i have no idea how to even set this up. please someone help.

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  1. A common formula to change wavelength to frequency and frequency to wavelength uses the speed of light, c.
    c = frequency x wavelength
    c = 3E8 m/s

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  2. so would i set it up (3.00 x 10^8)/(4.74 x 10^-7) ?

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  3. Almost.The problem list frequency as 4.74E14 and not 4.74E-7.
    3E8 = 4.74E14*wavelength.
    w = 3E8/4.74E14 = ? in meters.
    Convert to nm.

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  4. and what is the formula to convert to nm?

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  5. 1E9 nm = 1 m

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