Solving for Alpha: Optic Axis and Beam Angles in CALCITE Block | 1st Post

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In summary, the question is about finding the angle of incidence for a beam of light passing through a CALCITE block with the Optic Axis parallel to the surface. The thickness of the block is H and it has an ordinary index N and extraordinary index Ne. The beam of light strikes the surface at an angle of Alpha from the vertical, resulting in two out beams - the ordinary and extraordinary beams. The goal is to find Alpha. The use of Snell's Law is suggested, but it may result in an unsolvable equation.
  • #1
HoangFat
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Well, this is the question from the end term exam of the Optic 1 year 1 ago that I got from the senior, we (me and my friends) get confused. I try to slove this problem by Geometry Optic but the final equation can't slove (if sloved it will be loooooong to slove on the short time). I think abount using Fremat's Principle, but I can't detect the way to mash it.

so :
The CALCITE block with the Optic Axis parallel with the surface,the thickness is H
(ordinary index N and extraordi index Ne
A beam of light trikes the surface at an angel of incidence of Alpha from the vertical., the plane which keep the beam perpendicular with the OA.
2 Out beams,the ordinary beam and the extraordinary beam, parallel with the distant L !

>>Find Alpha

Fig: http://img178.imageshack.us/my.php?image=opticko7.jpg"

Yep, that all !

Hmmm.. This is my 1st post, I hope I didnt post a homework (yeah this is not homework).
And my English is bad T.T
 
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  • #2
Welcome to PF :smile:

Are you familiar with Snell's Law? I think that will be useful here.
 
  • #3
Ya ! I used the Snell's law in Geometry Methol, but I think using the wave mothol in sloving,
If you use the Sneel's law you 'll got the unsloveable quation T.T
 

FAQ: Solving for Alpha: Optic Axis and Beam Angles in CALCITE Block | 1st Post

What is Optic and why is it important in science?

Optic, also known as optics, is the branch of physics that deals with the study of light and its properties. It is important in science because light is a fundamental part of the natural world and understanding its behavior is crucial in many fields such as astronomy, biology, and engineering.

How does light travel and what affects its speed?

Light travels in a straight line at a constant speed of approximately 300,000 km/s in a vacuum. However, the speed of light can be affected by the medium it travels through. For example, light travels slower in water than in air, and even slower in glass or other dense materials.

What is the difference between reflection and refraction?

Reflection is the bouncing back of light when it hits a surface, while refraction is the bending of light as it passes through a medium with a different density. Reflection produces a mirror image, while refraction can cause the light to change direction and speed.

How do lenses and mirrors work to manipulate light?

Lenses and mirrors work based on the principles of refraction and reflection. A lens can bend light to converge or diverge it, which allows us to see objects clearly. Mirrors, on the other hand, reflect light at an angle, allowing us to see an image of the object being reflected.

What is the relationship between light and color?

Color is a visual perception that is created when light is reflected off an object and enters our eyes. The color we see is determined by the wavelength of light that is reflected. For example, a red object reflects light with a longer wavelength, while a blue object reflects light with a shorter wavelength.

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