Questions tagged [optical-properties]
Questions related to color as well as the reflecting and refracting properties of chemicals.
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Why only Balmer series of hydrogen spectrum is visible?
When I was reading about the hydrogen spectrum, I came across the statement:
Only Balmer series of hydrogen spectrum can be visible to our eyes.
I really got surprised by that. Why can't other ...
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Are all helicenes optically active? Aren't they having a plane of symmetry?
Are all helicenes optically active?
Aren't they having a plane of symmetry or centre of symmetry?
Please give a detailed explanation
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What is the lowest possible refractive index a solid can have?
In optics, the refractive index (or refraction index) of an optical medium is a dimensionless number that gives the indication of the light bending ability of that medium. What is the minimum ...
user145192
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How exactly are mirror images of molecules rotated to determine enantiomeric pair?
I know there are many similar questions to this but none could clear my confusion over how exactly the mirrored molecules is rotated i.e on which axis it is rotated to superpose with the original ...
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DIY hydrolysis of starch with copper and test them with polarizer sheet due to muta rotation
When I read about muta rotation — the interconversion of alpha to beta glucose — recently, I decided to do it with rice, because rice contain 66% of starch which is alpha glucose polymer. To hydrolyze ...
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Finding or designing a thermochromic that becomes transparent to NIR at room temperature
Are there known nanoparticles or organic materials that have the following properties:
absorb near-infrared light and convert them to heat at temperatures below a certain threshold
become mostly ...
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Co(NO3)2 forming colloid in H2O, and Methanol
I was just trying to make a stock solution of some Co(NO3)2 . One in H2O, another in Methanol. Both don't completely dissolve. They're almost dissolved and appear near translucent but when shining a ...
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When C2 axis of symmetry is present then is the compound meso?
If suppose a compound has C2 axis of symmetry then is it confirmed that the compound will be meso or it can have an enantiomeric pair? And which of following conditions are sufficient enough to ...
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Detection of contamination from salicylic acid via either single excitation fluorometer or via absorbance
My colleague detected fluorescent contamination likely from salicylic acid in some water samples. I have made a new batch and want to check whether my new samples also have this contamination.
1. Can ...
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What is the diffusivity of colloidal Formazine in water?
I have synthesized Foramzine in an aqueous solution (turbidity = 4000 NTU), and will be further diluting it. I would like to know the diffusion coefficient (diffusivity/mass diffusivity) of colloidal ...
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Biocompatible, high refractive index medium for 780 nm?
I am trying to find a medium for optics experiments on living cells. I have been using yeast cells, saccharomyces cerevisiae and saccharomyces boulardii, and need a medium with refractive index (RI) ...
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Doubt in chirality and pseudo chirality
So a carbon atom is chiral if it has 4 different group attached to it, and it is pseudo chiral if it has 3 different groups of atoms attached to it, where the 2 similar groups have different ...
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Application of Beer-Lambert Law to Absorptivity
The Beer-Lambert law gives a linear relationship between the concentration of a solute $c$ and the absorbance $A$, with absorbance defined as the logarithm of the ratio between the transmitted radiant ...
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Which gas at 15 °C and 1 atmosphere of pressure has the highest refractive index in visible light?
For my own curiosity's sake, I am attempting to find the gas that at 15 °C and 1 atmosphere of pressure in pure form has the highest refractive index on average and overall, for visible light. Assume ...
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How can I determine a stereogenic centre?
I have a problem understanding stereogenic centres. A stereogenic centre is specified (in the case of organic chemistry that I am interested to) as a carbon atom which is bounded to four different ...
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