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18 July, 00:39

The alpha line in the balmer series of the hydrogen spectrum consists of light having a wavelength of 6.56. calculate the frequency of this light

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  1. 18 July, 00:55
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    The alpha line in the Balmer series is the transition from n=3 to n=2 and with the wavelength of λ=656 nm = 6.56*10^-7 m. To get the frequency we need the formula: v=λ*f where v is the speed of light, λ is the wavelength and f is the frequency, or c=λ*f. c=3*10^8 m/s. To get the frequency: f=c/λ. Now we input the numbers: f = (3*10^8) / (6.56*10^-7) = 4.57*10^14 Hz. So the frequency of the light from alpha line is f = 4.57*10^14 Hz.
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