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
