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The tube is filled with noble gas (i.e. argon, neon, helium). The tube also contains a small amount of mercury that when heated becomes mercury vapor. The inside of the tube is lined with phosphorescent material (mostly phosphorous). In the base of the bulb is an electronic ballast that boosts the line voltage up high enough to ionize the gas inside the bulb. As this happens the mercury also vaporizes inside the tube. The ionized gas and ionized mercury vapor emit ultraviolet light which strikes the phosphorous. The phosphorous, in turn, emits white light that lights up the room.
Mercury is present inside the tube light.When we give supply to the tube light the mercury vapours excites and it produces uv radiation which then strikes the fluorescent material and produces light. Therefore it is called fluorescent light.
That depends on the 'tube' involved. In a thermometer the mercury expands and contracts within a sealed tube as the temperature is raised or lowered. In a barometer there is a reservoir of mercury which the atmosphere presses on. This maintains the mercury in a column which is sealed at the top. Increases in atmospheric pressure push the mercury further up the tube, decreases let it drop down the tube.
because,the adhesive force of mercury in more compared to the cohesive force which acts on a capillary tube. that's why mercury falls in capillary tube
Neon signs give off a characteristic bright red to reddish-orange light. Other colors are created by using argon and mercury, and coating the inside of the tube with phosphors that emit the desired color when ionized. The mercury ionizes and emits ultraviolet (UV) radiation. The UV light slams into the phosphor coating, and the phosphor emits light. The color of that light will be determined by the composition of the phosphor coating.
The tube is filled with noble gas (i.e. argon, neon, helium). The tube also contains a small amount of mercury that when heated becomes mercury vapor. The inside of the tube is lined with phosphorescent material (mostly phosphorous). In the base of the bulb is an electronic ballast that boosts the line voltage up high enough to ionize the gas inside the bulb. As this happens the mercury also vaporizes inside the tube. The ionized gas and ionized mercury vapor emit ultraviolet light which strikes the phosphorous. The phosphorous, in turn, emits white light that lights up the room.
A florescent tube is still a mercury vapour device and needs the mercury to vaporise to have the tube conduct to emit visible light.
The electrons in the mercury arc current in the tube causes the mercury vapor to emit ultraviolet light. The inside surface of the tube is coated with a phosphor that glows with visible light when hit by ultraviolet light.
due to presence of Mercury
They are made out of glass as a the tube and there is no active filament what actually creates the glowing is there is a gas inside the tube and the electricity that runs to it creates the gas to ionize which creates light.
Mercury is present inside the tube light.When we give supply to the tube light the mercury vapours excites and it produces uv radiation which then strikes the fluorescent material and produces light. Therefore it is called fluorescent light.
Mixture of argon gas and Mercury gas.
mercury vapour at low pressure.
ionized mercury vapor emits UV light.phosphor coating on inside of tube absorbs UV light and emits visible light.visible leaves tube.
Fluorescent lights glow because of an electric discharge in a glass tube that causes mercury atoms to emit ultraviolet light. The inside of the tube is coated with phosphor, which absorbs the ultraviolet light and then re-emits visible light.
the air off of Mercury has a big tube in the inside of it and it pushes in up
That depends on the 'tube' involved. In a thermometer the mercury expands and contracts within a sealed tube as the temperature is raised or lowered. In a barometer there is a reservoir of mercury which the atmosphere presses on. This maintains the mercury in a column which is sealed at the top. Increases in atmospheric pressure push the mercury further up the tube, decreases let it drop down the tube.