We can use the formula:
c = λν
where c is the speed of light (h = 2.998 x 10^8 m/s), λ is the wavelength in meters, and ν is the frequency in Hertz.
First, we need to convert the wavelength from nanometers (nm) to meters:
λ = 283.3 nm = 283.3 x 10^-9 m
Now we can plug in the values and solve for ν:
c = λν
ν = c/λ
ν = (2.998 x 10^8 m/s) / (283.3 x 10^-9 m)
ν = 1.06 x 10^15 Hz
Therefore, the frequency of the intense line of lead is 1.06 x 10^15 Hz.
A spectrum of lead shows an intense line of 283.3. Calculate the frequency
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