Large sweat stains were visible on his shirt and jacket as the heat index approached 95 degrees.
The tourmaline has a light-refractive index of 1.63, with a heat index of none, being to heat-rays completely opaque.
|heat index |
A measurement of the air temperature in relation to the relative humidity, used as an indicator of discomfort. The heat index is higher when high air temperatures occur with high humidity, and lower when they occur with low humidity. The heat index is based on studies of skin cooling caused by the evaporation of sweat. Also called apparent temperature.