Optical activity Definition and 12 Threads

  1. Dyn Doeth

    A Structural coloration of a zeolite monolayer

    I have a monolayer of zeolite crystals on glass with the thickness of the zeolites about 800nm. When I look at the reflection of fluorescent light bulbs on this monolayer, the reflection is white except at specific angles. At around 45 deg, the colour appears red/magenta and at a lower angle...
  2. M

    Why is [G] Sandwiched by Epsilon Inverses in Tensor Inverse Calculation?

    Clearly, they used the binomial expansion on this; however, I cannot figure out why [G] is sandwiched by the epsilon inverses: $$\varepsilon^{'-1}=1/(\varepsilon+i\epsilon_{0}[G])\approx(1-i\epsilon_{0}[G]\varepsilon^{-1})\varepsilon^{-1}$$
  3. P

    Chemistry Structural formulas & optical activity

    How do I determine which group is dash (into the page) and which is wedge (out of page)? Won't that literally change which isomer it is? How to determine optical activity then? (I believe that in order for something to be optically active it has to be an enantiomer--a non-superimposable mirror...
  4. Paul Colby

    Can Crystal Symmetry Explain the Lack of Optical Activity in Quartz?

    Hi, I've been looking at the optics of ##\alpha##-quartz which comes in two parities, left and right. Quartz is optically active which means that the plane of a linearly polarized beam propagating along the optic axis is rotated by an angle proportional to the distance traveled. I would like...
  5. Wrichik Basu

    Reason for Optical Isomerism (at electron level)

    I have been studying Optical Isomerism recently, and I have got one question, answer to which was not in the books that I have. I have understood what the phenomenon is, and that, how one can determine whether the plane of polarised light is rotated, and how to tell from the structure whether...
  6. R

    Refractive index as a function of the concentration of a sugar solution

    We recently performed an experiment with the idea to find refractive index of medium (water) as a function of wavelength of light. We then added some sugar to see how the refractive index changes with concentration of sugar solution. We got the following graphs. Are the relationships actually...
  7. Incnis Mrsi

    A Chirality of the electromagnetic force on atomic matter

    It’s commonly held that left and right photons interact with matter in exactly the same way, because electromagnetism “conserves parity”. But we know that P-symmetry, in our world, is generally broken. Even according to the Standard Model, when light propagates through some media, it interacts...
  8. T

    Difference between optically active and inactive compounds

    Any polarised light's plane is shifted while passing from one medium to another for refraction. So, optically active or not, a solution of any compound will cause refraction because of its density. Then what's special in an optically active compound?
  9. V

    Optical Activity: How Do Chiral Molecules Rotate Light?

    "Optical activity is the tendency of chiral molecules to rotate ppl" how does a chiral molecule rotate light? Is it because of interaction of electric fields? Anyone please help me? I just need to know how a molecule physically does that?
  10. C

    How Does Optical Activity Help Measure Sugar Concentration?

    Homework Statement The sugar concentration in a solution (e.g., in a urine specimen) can be measured conveniently by using the optical activity of sugar and other asymmetric molecules. In general, an optically active molecule, like sugar, will rotate the plane of polarization through an angle...
  11. K

    How Does Optical Activity Help Measure Sugar Concentration?

    The sugar concentration in a solution can be measured conveniently by using the optical activity of sugar nad other asymmetric molecules. In general, an optically active molecule like sugar will rotate the plane of polarization through an angle that is proportional to the thickness of the sample...
  12. A

    Optical Activity: How Do Organic Substances Rotate Polarized Light?

    optically active organic substances have the ability to rotate the plane of polarization of plane-polarized light. what i want to know is that how exactly do they rotate it?
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