[填空题]
Mass spectrometry uses fast-moving electrons to ionize particles and determine the mass-to-charge ratio of an unknown compound.
1.Using the data booklet section 1 and 2, calculate the frequency of an electron with a wavelength of 1.68m. $\times10^8s^{-1}$
2.Calculate the wavelength of an electron with a frequency of $2.00\times10^8s^{-1}$. m
3.State the effect of increasing the wavelength on frequency.
