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What is the wavelength of electromagnetic radiation with a frequency of 8.6 X 1011 Hz?

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The relationship between frequency and wavelength is given as:

`lambdanu = c`

i.e. the product of wavelength and frequency is equal to speed of light in vacuum, which is equal to about 3 x 10^8 m/s 

Hence, wavelength, `lambda`  = `c/nu`  

 = `(3xx10^8)/(8.6xx10^11)`

= `3.5xx10^(-4) m`

Hope this helps.

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