6:17 the equation for the effective refractive index only works with extraordinary rays. 9:03 The horizontal rays should be slower. I drew the outgoing arrows the opposite way.
This video was by far the clearest and best explanation of how birefringence interacts with light I've seen so far! I really needed this. Thank you so much for this content!
Very helpful video. Great graphics. I took a non linear optic class and the professor wasn't good at relating the concepts with simple intuitions. After watching this video I feel like a lot of time spent on understanding the equations could have been saved. thank you so much!
Wonderful explanation. The Wikipedia explanation for this is so bad that even after your good explanation here, I still can't make sense of what they are trying to say. Excellent work.
Thank you for useful information. This will be useful for me in the second Year of university and not only for me,but many people around the world. Thank you again💪
@@ReumiChannel Would you be able to answer how the refractive index of a medium affects the path length? I am studying a case where a Fabry Perot resonator is made using a birefringent material. So I was analyzing the FSR along parallel and perpendicular polarizations
@@ReumiChannel Would you be able to answer how the refractive index of a medium affects the path length? I am studying a case where a Fabry Perot resonator is made using a birefringent material. So I was analyzing the FSR along parallel and perpendicular polarizations
@@AnujDineshTripathi Hmm.. polarization dependence of a Fabry Perot? I'm not sure, but since birefringent materials have n_e and n_o separately, it should affect the path length (The angle of refraction, and the speed in the material would definitely be slightly different). By the way, it's quite difficult to calculate the angle of refraction when a ray is entering the birefringent material slightly angled (so incident angle isn't zero). That's like graduate level. That's all I could tell you.
This is a slightly different question, but anisotropic just means the properties are not all consistent in different directions. Isotropic materials can also bend light
@@ReumiChannel I know what you said. What I want to ask is like when in 6:18 , the blue ray is called e-ray? And it is related to theta, if the ray go into the crystal at first, it get the ne. And at the same time the other theta generate. So it get a new ne and so on. So the light keep change direction as long as its moving direction is not 0 or pi/2 ? I don't know if my words is ok. I'm not native. Hope you can understand.
hi, I have a cuestrion, it is trure that when a birrefrigant cystal is radiated with ligth at a 45º angle to its optic plane, the ligth that was originaly in fase will end up out of fase, becouse it does not take the sema time to go through the x axis ande the y axis. However, why is this not in opposition to the principle of least time??
Because in a uniaxial crystal (where you have three n: n1, n2 and n3), you have two n that are equal to each other, so here for example it is n1=n2 and n3 is different. And then you rename it to no (not zero, but 'o' which stands for ordinary) and ee (where the 'e' stands for extraordinary). In result, we have "two" no because n1=n1=no.
6:17 the equation for the effective refractive index only works with extraordinary rays.
9:03 The horizontal rays should be slower. I drew the outgoing arrows the opposite way.
This video was by far the clearest and best explanation of how birefringence interacts with light I've seen so far! I really needed this. Thank you so much for this content!
Thank you for the comment :)
Very helpful video. Great graphics. I took a non linear optic class and the professor wasn't good at relating the concepts with simple intuitions. After watching this video I feel like a lot of time spent on understanding the equations could have been saved. thank you so much!
I wish i had an option to give 100 likes on this video.
This video is proof that concepts can be easy if explained properly.
keep it up!
Aw. Thanks so much!
This is the best video on the internet for this topic
Wow very helpful especially with the graphics and explanation starting around 4:40. Thanks!!
bro that's insane that you make such a simple explanation. immediately subscribed.
Thanks a lot haha
very useful for studying for my Space instrumentation exam!
wonderful video! I am about to have an exam in photonics and this video is just wonderful
It's the best explanation that I found! I spend all day today to reading about polarisation but your video gives me the answer. I am the new fan :)
Haha I'm glad to hear
Wonderful explanation. The Wikipedia explanation for this is so bad that even after your good explanation here, I still can't make sense of what they are trying to say. Excellent work.
Thank you so much.
I have my finals in 2 weeks, and this video really cleared up a lot of confusion I had surrounding Optical Mineralogy
Thank you for useful information. This will be useful for me in the second Year of university and not only for me,but many people around the world. Thank you again💪
Not a problem!
Better explanation than my teacher! Thanks
Good and clear explanation!!! Helps me a lot! Thank you.
Amazing video, cleared all my doubts
Great work
superb presentation, clear explaination, no confusion left after watching this video... thanks!
Very helpful. Lot of confusion resolved
Thank you so much for the video. The explanation is so simple and brilliant.
Haha thanks!
@@ReumiChannel Would you be able to answer how the refractive index of a medium affects the path length? I am studying a case where a Fabry Perot resonator is made using a birefringent material. So I was analyzing the FSR along parallel and perpendicular polarizations
@@ReumiChannel Would you be able to answer how the refractive index of a medium affects the path length? I am studying a case where a Fabry Perot resonator is made using a birefringent material. So I was analyzing the FSR along parallel and perpendicular polarizations
@@AnujDineshTripathi Hmm.. polarization dependence of a Fabry Perot? I'm not sure, but since birefringent materials have n_e and n_o separately, it should affect the path length (The angle of refraction, and the speed in the material would definitely be slightly different). By the way, it's quite difficult to calculate the angle of refraction when a ray is entering the birefringent material slightly angled (so incident angle isn't zero). That's like graduate level. That's all I could tell you.
Immaculate explanation. Thanks.
Props up excellent video with clear explanations good job my guy
It was so effective. Hope you will bring more things.
Thanks :) and yes, I will.
Very clear explanation. Thanks a lot!
so good! Thanks from Yale graduate students.
Yale!! I'm honored ;)
very clear and informative video!
Simply, thank you
GOD tier explanation
Wow haha.. thx a lot for the great compliment
i wish i could give 100k likes alone to this video. Thanks a lot brother.
thanks for this informative video
❤
Amazing video!
I like the 2 cats at the end :) keep it up!
this is a really good video!! You save my exam. Can I ask u how did you draw these pictures?
Powerpoint :)
@@ReumiChannel amazing. Can u please tell about how can the light change the direction in anisotropic material
This is a slightly different question, but anisotropic just means the properties are not all consistent in different directions. Isotropic materials can also bend light
@@ReumiChannel I know what you said. What I want to ask is like when in 6:18 , the blue ray is called e-ray? And it is related to theta, if the ray go into the crystal at first, it get the ne. And at the same time the other theta generate. So it get a new ne and so on. So the light keep change direction as long as its moving direction is not 0 or pi/2 ? I don't know if my words is ok. I'm not native. Hope you can understand.
although now I get it, but still it would be great to have the biaxial explanation as well. just for the sake of helping us grasp it better
really helpful thank you😭
Thank you for this video 😊
Not a problem
Hi, thank you for this great explanation. I have a question is the optic axis always in the same direction as extraordinary ray?
Yeah
hi, I have a cuestrion, it is trure that when a birrefrigant cystal is radiated with ligth at a 45º angle to its optic plane, the ligth that was originaly in fase will end up out of fase, becouse it does not take the sema time to go through the x axis ande the y axis. However, why is this not in opposition to the principle of least time??
Good question. You should first ask what group velocity is. Also, see graphical explanation for Snell's law.
@@ReumiChannel thanks
exalting video
thanks good video
Very good
I don’t understand. Why are there two n0?
Because in a uniaxial crystal (where you have three n: n1, n2 and n3), you have two n that are equal to each other, so here for example it is n1=n2 and n3 is different. And then you rename it to no (not zero, but 'o' which stands for ordinary) and ee (where the 'e' stands for extraordinary).
In result, we have "two" no because n1=n1=no.
Thank you!
Since you use the term so often, you might have defined "optic axis."