Recent content by Donchay

I've been making glass and observe their optical properties from range of x=0.1 to x=0.3. So that would make CuO the second oxide, and thus binary glass?

is [(TeO2)70(B2O3)30]1-x(CuO)x a binary oxide glass? What is the definition of second oxide? Is the second oxide for the above glass is CuO??

DrDu I'm working on a university project to find the the optical property of a kind of glass. One of the property I'm doing research on is the dispersion of the glass, and therefore I will be looking into it's Abbe number. I have done the test on refractive index and obtain some data...

I don't understand how the formula works; vD= nD-1 / nF-nC given nD,nF and nC are the Fraunhofer's line with wavelength of 589.3, 486.13, and 656.27 respectively in nm. Now my trouble starts here. Since the wavelengths are already given , VD is always a constant. How does the...

I understand about the line frequencies. Just that is it n(lambda)=n_F - n_C ?

Thank You DrDu. While the above formula is for Optical Dispersion, then is it the same dispersion for the Abbe Number: Vd=(nD-1)/nF-nC where nF-nC is the dispersion according to this link http://glassproperties.com/abbe_number/ but somehow on other link I read that nF-nC is called...

In optics, given the below formula nλ= A + B/λ2 + C/λ4 +... where A, B and C are constants. From the above relationship we can deduce that as the wavelength λ increases, the variation of refractive index nλ decreases. How do we measure the constant value of A,B and C at the first...

I've been looking on journals and textbook, as well as internet. Does anybody know if there is an equation to find out the value of direct optical band gap and indirect optical band gap? What is the difference of optical band gap, direct optical bandgap and indirect optical bandgap? also...