tarangadairghya

sign-aakaareeya anuprasth tarang ka tarangadairghya, λ

bhautiki mein, koi sign-aakaar ki tarang, jitni doori ke baad apne aap ko punaraavrut (repeat) karti hai, us doori ko us tarang ka tarangadairghya (wavelength) kehte hain. deergh (= lamba) se 'dairghya' bana hai.

tarangadairghya, tarang ke samaan kala vaale do kramaagat binduon ki doori hai. ye bindu tarangasheersh (crests) ho sakte hain, tarangagart (troughs) ya shoonya-paaran (zero crossing) bindu ho sakte hain. tarang dairghya kisi tarang ki vishishtata hai. ise greek akshar 'laimbda' (λ) dvaara nirupit kiya jaata hai. iska SI maatrak meter hai.

kisi tarang ke tarangadairghya (λ), tarang ke veg (v) tatha tarang ki aavruti (f) mein nimnalikhit sambandh hota hai-

anukram

vidyutachumbakeeya maadhyam mein tarangadairghya

di-braagali tarangadairghya

inhein bhi dekhein

baahari kadiyaaain