Mach,
Ernst Maiman,
Theodore Harold Malus,
Etienne Louis Marconi,
Guglielmo Mariotte,
Edme Marius,
Simon Mauchly,
John William Mayer,
Christian Mayer,
Johann Tobias Mayer,
Julius Robert von McMillan,
Edwin Mattison Meitner,
Lise Menzel,
Donald Howard Michelson,
Albert Abraham Millikan,
Robert Andrews Mises,
Richard von Morley,
Edward Moseley,
Henry Gwyn Jeffreys Mössbauer,
Rudolf Ludwig Mott,
Nevill Francis Mottelson,
Ben (Roy) Müller,
K. Alexander Mulliken,
Robert Sanderson