The three principal visible spectral lines from hydrogen encompass wavelengths of 434 nm, 486 nm and 656 nm. The principal line of sodium is at 589 nm. A sodium lamp employed to calibrate a diffraction grating exhibits the first-order sodium line at 24.3 from the central maximum.
i) Determine the angular position of the first spectral line in hydrogen of 434 nm.
ii) Determine the angular position of the second spectral line in hydrogen of 486 nm.
iii) Determine the angular position of the third spectral line in hydrogen of 656 nm.
Deduce your answer with the correct units.