coherence lenth kya hai defination ?
Answers
Answered by
1
Answer:
"In physics, coherence length is the propagation distance over which a coherent wave (e.g. an electromagnetic wave) maintains a specified degree of coherence. ... A wave with a longer coherence length is closer to a perfect sinusoidal wave. Coherence length is important in holography and telecommunications engineering."
Explanation:
"lc = λ2/(2πΔλ) = λf/(2πΔf) = c/Δω, tc = 1/Δω. If we know the wavelength or frequency spread of a light source, we can calculate lc and tc. We cannot observe interference patterns produced by division of amplitude, such as thin-film interference, if the optical path difference greatly exceeds lc."
Similar questions