When a Certain X Ray Is Compton Scattered at Right

Multiple Choice

When a certain x ray is Compton scattered at right angles to its initial direction, the shift in its wavelength is λ _c = 2.4 pm 1 picometer = 10^-12 m) . If the wavelength of this ray is 15.4 pm, the wavelength of the scattered x ray must be closest to

A) 2.4 pm.
B) 0.15 pm.
C) 18 pm.
D) 13 pm.
E) 170 pm.