Does Coherent Light Waves Frequency Matter?

AI Thread Summary
Coherent light waves must have a constant phase difference, which typically implies they share the same frequency. However, light waves with the same frequency can still be incoherent if they lack a consistent phase relationship. Coherence is defined by two main factors: temporal coherence, which relates to frequency spread, and spatial coherence, which pertains to the source's size. For instance, lasers often produce temporally coherent but spatially incoherent light, while distant stars can emit spatially coherent yet temporally incoherent radiation. Understanding these distinctions is crucial for applications in optics and photonics.
west
Messages
3
Reaction score
1
does coherent LIGHT waves with a constant phase difference MUST have the same frequency?

what about LIGHT waves with the same frequency only? will it be not coherent??
 
Science news on Phys.org
Coherence is a statistical measure of the field. The two major 'limits' are temporal coherence, related to frequency spread, and spatial coherence, related to the size of the source. So, it's very possible to have a highly temporally coherent, spatially incoherent source (most lasers have this type of radiation), or highly spatially coherent and tempoerally incoherent radiation (distant stars).
 
err so may i know what you are trying to say? i can't catch your words...maybe a direct answer to those questions would be better

TQ
 
Thread 'Simple math model for a Particle Image Velocimetry system'

Thread 'Simple math model for a Particle Image Velocimetry system'

Hello togehter, I am new to this forum and hope this post followed all the guidelines here (I tried to summarized my issue as clean as possible, two pictures are attached). I would appreciate every help: I am doing research on a Particle Image Velocimetry (PIV) system. For this I want to set a simple math model for the system. I hope you can help me out. Regarding this I have 2 main Questions. 1. I am trying to find a math model which is describing what is happening in a simple Particle...
View full post »

Thread 'Pentaprism with magnification, which surface is curved?'

I would like to use a pentaprism with some amount of magnification. The pentaprism will be used to reflect a real image at 90 degrees angle but I also want the reflected image to appear larger. The distance between the prism and the real image is about 70cm. The pentaprism has two reflecting sides (surfaces) with mirrored coating and two refracting sides. I understand that one of the four sides needs to be curved (spherical curvature) to achieve the magnification effect. But which of the...
View full post »

Similar threads

Effects of coherence length on optical interference filter
2
Replies
66
Views
5K
I Why do we use low-coherence light in Optical Coherence Tomography?
Replies
1
Views
3K
Wave interference - coherence and wavelength
Replies
7
Views
3K
Question about wave interference and coherence
Replies
8
Views
2K
Do two light waves with difference frequencies connect when they meet?
Replies
5
Views
2K
What restricts two separte sources of light to act coherent?
2
Replies
68
Views
13K
A The coherence length is much longer than the manufacturer claims
Replies
10
Views
2K
How does a Resonator enhance coherence? (LASER)
Replies
2
Views
1K
Laser light vs "Regular" Light
Replies
14
Views
2K
A Fourier Optics: Why a Plane Wave contributes to just a single point
Replies
13
Views
2K

Hot Threads

Recent Insights

Back
Top