http://blog.phillips-safety.com/glassblowing-lenses/
How about UV radiation? On Wed, Dec 10, 2014 at 11:15 AM, Bob Higgins <rj.bob.higg...@gmail.com> wrote: > Brightness depends on how much light is in the visible range. What is > happening is that as the device gets hotter, a greater percentage of the > light falls in the visible range, AND, a greater total amount of radiative > energy is being emitted. Both are going on at the same time. It gets > bright enough to want some darkening glasses (and put on your shiny > sunscreen oil for the infrared). > > On Wed, Dec 10, 2014 at 11:01 AM, Finlay MacNab <finlaymac...@hotmail.com> > wrote: > >> >> >> ------------------------------ >> >> *Hard to look at with the naked eye? I don't recall anything in the >> lugano report about the ecat being hard to look at.* >> >> I am not sure this is correct. >> >> An examination of black body radiative power versus temperature shows >> that below 3000 degrees kelvin the emission from a hot body is diffuse and >> the bulk of the energy is at longer wavelengths. >> https://www.e-education.psu.edu/astro801/content/l3_p5.html >> >> A 1700K radiator (1400 Celsius) has a peak emission intensity of around >> 1.7microns in the infrared. >> >> The wikipedia page on infra-red heaters has a picture of quartz heating >> elements that operate at 1500C. The text accompanying the picture implies >> that the lamp is radiating 100W/inch or 780 W over 20cm (the length of the >> Rossi reactor). http://en.wikipedia.org/wiki/Infrared_heater >> >> Based on this information, I don't think the reactor would have to appear >> very bright to the naked eye. >> >> Finlay >> > >
