Joseph has found that when he passes a high voltage current through an evacuated tube, he can make a phosphor coating on one end of the tube glow. One day he makes the that if a metal shape is put in the middle of the tube, it casts a shadow on the phosphor coating.
Answer: The phosphor coating is shadowed when a metal form is placed in the center of the tube.
Who or what uses phosphor?
The majority of the light emitted by fluorescent lamps is created by phosphor layers, which are also used to balance the light from metal halide lamps. To create multiple light hues, neon signs employ phosphor layers.
Phosphorus may be found where?
The richest sources of phosphorus include dairy, red meat, poultry, shellfish, legumes, and nuts, while phosphorus is naturally present in a wide range of foods. It is referred to as organic phosphorus when it is present in certain meals. Foods from animals and plants both facilitate its absorption more effectively.