The three principal visible spectral lines from hydrogen encompass wavelengths 434 nm, 486 nm and 656 nm. The principal line of sodium is at 589. The sodium lamp employed to calibrate a diffraction grating exhibits the first-order sodium line at 26.0 degrees from the central maximum.
i) Determine the angular position of the first spectral line in the hydrogen.
ii) Determine the angular position of the second spectral line in the hydrogen.
iii) Determine the angular position of the third spectral line in the hydrogen.