Recent content by sjumesh

Dear Chestermiller, Thank you for your reply. i will look in the polymer science for further details. regards, Umesh.S

Dear Chestermiller, At first, thank you for your message. Yes, i was asking for these equations. And, also is there any relationship between the thermal expansion and refractive index of material. Any equation relating thermal expansion and refractive index of material. Can you suggest me...

Hello all, Is there any direct relation ship exists between the thermal expansion and density of polymer material (eg. PMMA, Teflon) ? Like, Lorentz- lorentz law relates directly the refractive index and density of the polymer. similarly any laws relating (thermal expansion and density of...

Hello all, whether the Refractive index of piezoelectric materials (Example: Polyvinylidene fluoride-PVDF ) changes by the application of pressure, strain or force ?

Hello Andy, thanks for your reply. i will check the above mentioned links. I use 1550nm wavelength range.

Hello all, I had clarified that refractive index of material such as(aluminium, copper, lead, teflon)changes with the temperature. the refractive index change even for this temperature range: -196 to 25°C ? I need to know like any law which gives a direct relationship between 1)the density and...

Hello Simon Bridge, At first thanks for your valuable reply. yeah i am not used to scientific conversations and its my first post on the forum. Sorry for the confusion. its about the temperature range: 77 to 373K or -196 to 100 degC. i wanted to know. i will follow up in future as you told...

Hello all, I want to know that refractive index of materials like cooper, zinc, aluminium, teflon, PMMA varies with the application of heat from room to 100°C and for negative temperatures 77k to 300k. thanks in advance.