An difríocht idir athruithe ar: "Leathré"
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Guliolopez (plé | dréachtaí) m Rang |
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Líne 1:
Is é is '''leathré''' ann ná an t-am ina dtagann [[meath radaighníomhach]] ar adamh as gach beirt de chuid [[núiclíd]] áirithe.
Meathann dúil áirithe go easpónantúil
Táispeanann an tábla ar dheis conas a laghdaíonn an méid i dtearmaí leathré
{| class="wikitable" align=right
! Méid<br>leathré<br>caite !!codán<br>fágtha !! As<br> cumhacht<br>2
|-
| 0 || 1/1 || <math>1/2^0</math>
|-
| 1 || 1/2 || <math>1/2^1</math>
|-
| 2 || 1/4 || <math>1/2^2</math>
|-
| 3 || 1/8 || <math>1/2^3</math>
|-
| 4 || 1/16 || <math>1/2^4</math>
|-
| 5 || 1/32 || <math>1/2^5</math>
|-
| 6 || 1/64 || <math>1/2^6</math>
|-
| 7 || 1/128 || <math>1/2^7</math>
|-
| ... || ...
|-
| <math>N</math> || <math>1/2^N</math> || <math>1/2^N</math>
|}
Is féidir a thaispeant le meath easpónantúil, go leanann <math>t_{1/2}</math> an caidreamh seo:
:<math> t_{1/2} = \frac{\ln (2)}{\lambda} </math>
nuair atá
:* <math>\ln (2)</math> mar an [[logartam aiceanta]] den uimhir 2, agus
:* <math>\lambda</math> mar an '''meath tairiseach''', tairiseach dhuilteach chun chuir síos ar an meath easpónantúil.
Tá an leathré gaolta leis an meán saolra τ leis an caidreamh seo:
:<math> t_{1/2} = \ln (2) \cdot \tau </math>
{{stumpa}}
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