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? (R_H = 1.097 *10⁷ m ^{- 1}. )

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