Tonn dhamhnach
Is cuid lárnach de theoiric na meicnice chandamach iad 
 tonnta damhnachaí, mar shampla de dhéacht toinne is cáithnín. Taispeánann gach damhna iompar cosúil le tonn. Mar shampla, is féidir leictreonléas a díraonadh díreach cosúil le tonn solais nó tonn uisce. I bhformhór na gcásanna, áfach, tá an tonnfhad róbheag le tionchar praiticiúil a bheith aige ar ghníomhaíochtaí ó lá go lá.

Mhol an fisiceoir Francach Louis de Broglie an coincheap go n-iompraíonn damhna mar a bheadh tonn ann sa bhliain 1924. Tugtar hipitéis de Broglie air freisin .  Tugtar  tonnta de Broglie  ar thonnta an damhna.

Is é tonnfhad de Broglie an tonnfhad, λ, a bhaineann le cáithnín ollmhór (ie, cáithnín le mais, seachas cáithnín gan mhais) agus tá baint aige lena mhóiminteam, p, trí tairiseach Planck, h :

Tagairtí

Tuilleadh léitheoireachta
 L. de Broglie, Recherches sur la théorie des quanta (Researches on the quantum theory), Thesis (Paris), 1924; L. de Broglie, Ann. Phys. (Paris) 3, 22 (1925). English translation by A.F. Kracklauer.
 Broglie, Louis de, The wave nature of the electron Nobel Lecture, 12, 1929
 Tipler, Paul A. and Ralph A. Llewellyn (2003). Modern Physics. 4th ed. New York; W. H. Freeman and Co. . pp. 203–4, 222–3, 236.
 
 An extensive review article "Optics and interferometry with atoms and molecules" appeared in July 2009: https://web.archive.org/web/20110719220930/http://www.atomwave.org/rmparticle/RMPLAO.pdf.
 "Scientific Papers Presented to Max Born on his retirement from the Tait Chair of Natural Philosophy in the University of Edinburgh", 1953 (Oliver and Boyd)

Naisc sheachtracha
 Tonnta de Broglie. http://www.sixtysymbols.com/videos/debroglie.htm

Damhna
Tonnta
 Fisic chandamach bhunaidh