Red light of frequency $430 \times 10^{12} Hz$ has a wavelength of $700 \times 10^{-9} m$.
What is possible for blue light?
1 )
a frequency of $190 \times 10^{12} Hz$ and a wavelength of $450 \times 10^{-9} m$
2 )
a frequency of $190 \times 10^{12} Hz$ and a wavelength of $950 \times 10^{-9} m$
a frequency of $670 \times 10^{12} Hz$ and a wavelength of $450 \times 10^{-9} m$
4 )
a frequency of $670 \times 10^{12} Hz$ and a wavelength of $950 \times 10^{-9} m$
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