1. The inverse square law of illuminance Definition: The illuminance perpendicular to the direction of propagation of the light is proportional to the intensity of the light source in that direction and inversely proportional to the square of the distance from the source to the surface. Note: Only the point source meets the inverse square law of distance. (The test distance should not be less than 10 times the maximum size of the light exit surface of the lamp.) 2. The law of cosine of illumination: 3. Cosine Cube Law Where: I—the intensity of the light from which the point source is directed; H—the height of the light source from the plane; Θ—the angle between the plane normal and the incident ray; — OA length.
Mineral Insulated cables, or simply Mica cables, are cables in which
conductors or wires are enclosed by a metal jacket and insulated with
hard-packed mica. It is a variety of electrical cable made from copper
conductors inside a copper sheath, insulated by mineral mica powder. Mineral
Insulated cable is a specialized type of cable used in high temperatures
or harsh environmental conditions because it has low flammability, even
when operating at high temperatures. The maximum continuous operating temperature is
250℃. The cable can supply with power continuously for 3 hours
at 950-1000℃. The mineral fillings in cables provide excellent non-reactive
insulation. It resists oxidation and enables precise measurement.
Advantages:
Application:
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