0
What else can I help you with?
Why are low pressure mercury-vapour lamps coated with phosphors?
Low-pressure mercury-vapour lamps are coated with phosphors to convert the ultraviolet light emitted by the mercury into visible light that is more useful for general lighting purposes. This process allows the lamp to produce a broader spectrum of light, making it more appealing and efficient for human vision.
Who invented the real fluorescent lamp?
The real fluorescent lamp was invented by the German-American engineer and inventor, Peter Cooper Hewitt, in 1901. His lamp used an electric arc in mercury vapor to produce a blue-green light, which was an early precursor to modern fluorescent lighting.
Principle of operation of UV lamp?
A fluorescent lamp or fluorescent tube is a gas-discharge lamp that uses electricity to excite mercury vapor. The excited mercury atoms produce short-wave ultraviolet light that then causes a phosphor to fluoresce, producing visible light. A fluorescent lamp converts electrical power into useful light more efficiently than an incandescent lamp. Lower energy cost typically offsets the higher initial cost of the lamp. The lamp is more costly because it requires a ballast to regulate the flow of current through the lamp.
How does a fluorescent lamp operate?
A fluorescent lamp operates by sending electrical current through a gas-filled tube containing mercury vapor. This current excites the mercury atoms, causing them to emit ultraviolet light. The ultraviolet light then interacts with the phosphor coating on the inside of the tube, causing it to glow and emit visible light.
Who scientist invented fluorescent lamp?
The fluorescent lamp was invented by American engineer and inventor, George Inman, who developed the first commercially viable fluorescent lamp in 1934.
What does turning on a fluorescent lamp create?
A plasma arc of argon gas and/or other ions, such as mercury vapour, depending on the gas mixture used in the lamp.
What is the terminology HPMV for a lamp?
HPMV stands for High Pressure Mercury Vapor, which refers to a type of lamp that produces light by exciting mercury vapor with electricity. These lamps are often used in outdoor lighting applications due to their high efficiency and long lifespan.
What is CFL mhl and hpmv lamps?
The abbreviations are CFL - Compact Fluorescent Lamp, MHL - Metal Halide Lamp, HPMV - High Pressure Mercury Vapor, and one more is HPS - High Pressure Sodium lamp
What is a similarity in the line spectrum of mercury and the spectrum of the fluorescent bulb?
A fluorescent lamp contain mercury so the identities of spectrum are normal.
If a fluorescent lamp is brokenwhat chemical can contaminate the surrounding environment?
A broken fluorescent lamp can release mercury vapor, which is a toxic chemical that can contaminate the surrounding environment. It is important to carefully clean up and dispose of broken fluorescent lamps to prevent exposure to mercury.
How bright is 950 lumens?
220 lumens is equal to a tungsten incandescent light bulb of 15 watts. Halogen lamp 20 watts. Fluorescent lamp 60 watts. LED lamp 60 watts. high pressure sodium vapour lamp 117 watts. Mercury vapour lamp 50 watts or 17.32 candle power
What are compact flourecent lamps?
A Compact Fluorescent Lamp (CFL) is type of energy-saving bulb made from a small glass tube which is filled with mercury vapour. It has a phosphorescent coating on the inside of the tube which glows...
What gase use in flurocent lamp?
Fluorescent lamps use a mixture of gases, including mercury vapor and argon, to produce light. When electricity passes through the gases, ultraviolet light is produced, which then interacts with the phosphor coating inside the lamp to create visible light.
If a fluorescent lamp is broken what chemical can contaminate the surrounding environment?
A broken fluorescent lamp can release mercury vapor, which is a toxic chemical that can contaminate the surrounding environment. Mercury exposure can be harmful to human health and the environment, so it's important to handle and dispose of broken fluorescent lamps properly.
Why are low pressure mercury-vapour lamps coated with phosphors?
Low-pressure mercury-vapour lamps are coated with phosphors to convert the ultraviolet light emitted by the mercury into visible light that is more useful for general lighting purposes. This process allows the lamp to produce a broader spectrum of light, making it more appealing and efficient for human vision.
What is the type of gas in an arc lamp?
The type of gas commonly used in an arc lamp is typically a noble gas such as xenon or mercury vapor. These gases are chosen for their ability to produce a bright and steady light when an electric current is passed through them in the lamp.
When a common fluorescent lamp is on the mercury vapor inside is actually in a which state?
When a common fluorescent lamp is on, the mercury vapor inside is in an excited state. When an electric current passes through the mercury vapor, it excites the mercury atoms, causing them to release ultraviolet light. This ultraviolet light then interacts with the phosphor coating on the inside of the lamp, producing visible light.
