In F#-major an F# to G# would be a Major second. An F# to G-natural would be a minor second and an F# to Gb would be a diminished second (enharmonic unisons). Kudos to @Christian_R who got there ahead of me.
In F#-major an F# to G# would be a Major second. An F# to G-natural would be a minor second and an F# to Gb would be a diminished second (enharmonic unisons). Kudos to @Christian_R who got there ahead of me.