The Balmer series or Balmer lines in atomic physics,
is the designation of one of a set of six named series describing the spectral line emissions of the hydrogen atom.
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An administrative court in Rome ruled on Wednesday(14 August) that a Spanish rescue ship carrying around 150 migrants should be allowed to enter Italian territorial waters in defiance of a ban imposed by Interior Minister Matteo Salvini,
write Crispian Balmer and Catherine MacDonald.