Áit ❯ Gach Sainmhínithe ❯ Iarratais an Domhain Real ❯ Triantánacht ❯ Tonnfhad Sainmhíniú

Tonnfhad Sainmhíniú

In physics, the wavelength is the spatial period of a periodic wave. In other terms the distance over which the wave's shape repeats. It is the distance between consecutive corresponding points of the same phase on the wave, such as two adjacent crests, troughs, or zero crossings, and is a characteristic of both traveling waves and standing waves, as well as other spatial wave patterns. The inverse of the wavelength is called the spatial frequency. Wavelength is commonly designated by the Greek letter Lambda (Λ, λ). The term wavelength is also sometimes applied to modulated waves, and to the sinusoidal envelopes of modulated waves or waves formed by interference of several sinusoids.

Ag glacadh leis go bhfuil tonn sinusóideach ag gluaiseacht ag luas tonn seasta, is é an tonnfhad comhréireach inbhéartach go minicíocht den tonn. Ciallaíonn sé seo go bhfuil tonnfhaid níos giorra ag tonnta le minicíochtaí níos airde, agus go bhfuil tonnfhaid níos faide ag minicíochtaí níos ísle.

Braitheann an tonnfhad ar an meán (mar shampla, i bhfolús, aer, nó uisce) a thaistealaíonn tonn tríd. Is iad na samplaí de thonnta ná tonnta fuaime, solas, tonnta uisce agus comharthaí leictreacha tréimhsiúla i seoltóir. Is éard is tonn fuaime ann ná athrú ar bhrú aeir, agus i radaíocht éadrom agus leictreamaighnéadach eile, bíonn neart an leictrigh agus an réimse mhaighnéadaigh éagsúil. Is éagsúlachtaí iad tonnta uisce in airde coirp uisce. I gcreathadh laitíse criostail, athraíonn suíomhanna adamhacha.

Tugtar speictream ar an raon tonnfhaid nó minicíochtaí le haghaidh feiniméin tonn. Tháinig an t -ainm leis an speictream solais infheicthe ach is féidir é a chur i bhfeidhm anois ar an speictream leictreamaighnéadach iomlán chomh maith le speictream fuaime nó speictream creathaidh.

❮ Modh washer Meán ualaithe ❯