What Is the Difference in Wavelength for Spectral Lines Emitted

Multiple Choice

What is the difference in wavelength for spectral lines emitted by hydrogen for transitions from the n = 16 level to the n = 2 level and transitions from the n = 15 level to the n = 2 level? (RH = 1.097 * 107 m-1.)

A) 1.0 * 10- m
B) 2.0 *10-10 m
C) 4.1 * 10- m
D) 8.1 *10-10 m
E) 1.6 * 10-9 m