A sample is bombarded by incident X-rays, and free electrons in the sample scatter some of the X-rays at an angle of -0= 122.0 degrees with respect to the incident X-rays (see Figure 29.10). The scattered X-rays have a momentum whose magnitude is 1.856 x 10^-24 kg *m/s. Determine the wavelength (in nm) of the incident X-rays. (For accuracy, useh=6.626x10^-34 J*s,c=2.998x10^8 m/s,andm=9.109x10^-31 kg for the mass of an electron.)