How Many Times Longer Is the Wavelength of Electromagnetic Radiation $\alpha$

Multiple Choice

How many times longer is the wavelength of electromagnetic radiation used in a microwave oven at 2.45 GHz than the copper K- $\alpha$ 1 x-ray radiation used in x-ray diffraction studies with an energy of 1.29 *10^-15 J?

A) 6.29 * 10⁷ times longer
B) 7.54 * 10⁷ times longer
C) 7.92 * 10⁸ times longer
D) 7.95 * 10¹⁷ times longer
E) 1.90* 10²⁴ times longer