Question

As the wavelength increases, the frequency

Answer 1

frequency decreases @francisco2

Answer 2

Keeping the velocity of Electromagnetic wave constant, If you Increase the value of its wavelength,the Value of Frequency of corresponding wave will decrease. as \[C=\lambda \nu\], where C is velocity of EM wave, 'nu' is frequency and 'Lambda' is wavelength of that wave. Now if the value of C is kept constant then
\[\lambda\] is inversely proportional to \[\nu\].