Why do colored bulbs emit colored light?

There are two scenarios here.

First, as Brother Ren said above, the lampshade has a color, and the light emitted by the filament is a composite light, which is composed of many colors, and when it encounters a colored transparent substance, the color light with the same color can pass through, and other color light cannot pass through, so we see the color, and its essence is the filtering effect of the color lampshade.

The second is neon lamp, the principle of neon is the formation of glow discharge between the electrodes, the neon tube is almost vacuum, there are electrodes on both sides, and a small amount of inert gas is filled in the middle, the color of the lamp is related to the type and concentration of inert gas and the voltage at both ends. A glow discharge is formed by ionizing a thin gas by an electric field.

1. The color of the painting.

2. The bulb is filled with inert gas, such as the non-colorless inert gas neon into the lamp, after the power is energized, the neon gas is excited by the power plant and turns red, and the neon sign is called by the English transliteration of the neon lamp, and argon, which will emit light blue light; Helium emits a reddish light:

Fill neon, argon, helium and mercury vapor together to get colorful neon lights.

Light in real life is basically composite light. The light of the electric lamp is composite light. The fire is also a composite light.

The principle of the colored bulb is to consider the light emitted by the tungsten filament through the stained glass, and the stained glass will absorb the light of different colors from him, revealing the same color of light as himself.

Are you talking about neon signs? The principle of neon sign is the principle of using rare (inert) gas to generate colored light. Different noble gases emit different colors of light when energized. The neon sign is filled with rare gases.

Because the lamp housing is made of colored transparent glass, the bulb inside is white, and when the white light passes through the stained glass, the light becomes the same color as the stained glass! Absolutely.

Inert gas is usually added to the bulb to change the color of the light!

Because the noble gas can emit different colors of light when it is electrified, people use it to make electric light sources for various purposes, such as navigation lights, flash lights, neon lights, etc.

We said that in science class. Noble gases are added to it. Noble gases are colored.

This is a junior high school chemistry problem!

Noble gases emit various colors of light when energized; '

Helium: Pink light.

Neon: Red light.

Argon: violet-blue light.

Xenon: Extra-strong white light.

The outside of the glass is coated with a layer of paint.

I thought it was also an inert gas, but then I found out that LZ was talking about color"Light bulbs"Ah, I support the 2nd floor.

Although the lamp emits white light, the lamp housing is colored, and of course it is colored pulling.

1. The bulb is colored.

2. The bulb is filled with inert gas.

A layer of paint was spitted on the outside.

x Thank you all for the pleasure, understood, may God, the God who made the solar system, bless the ecstasy of your heart!

This kind of lamp is neon, the principle of neon is the formation of glow discharge between the electrodes, the neon tube is almost vacuum, there are electrodes on both sides, and a small amount of inert gas is filled in the middle, the color of the lamp is related to the type and concentration of inert gas and the voltage at both ends. A glow discharge is formed by ionizing a thin gas by an electric field.

The principle of tungsten bulbs is that they emit light at high temperatures

1. The current passes through the tungsten wire, and the electrical power consumed by the resistance of the tungsten wire generates heat, which increases the temperature of the tungsten wire. (Electrical power = current squared x resistance).

2. When the temperature of tungsten filament reaches a certain level, it will emit light.

The reason for choosing tungsten wire: the resistance is greater than that of many metals, and the most important thing is that tungsten wire can withstand high temperatures!

In fact, the temperature of things will glow up to a certain level (there is a term called color temperature, different temperatures emit different light), the problem is that many things melt, vaporize, and oxidize before they reach the temperature at which they can emit light.

The bulb ruler circle is made according to the principle of the thermal effect of electric current. When the bulb is connected to the rated voltage, the current is heated to an incandescent state (2000C or more) through the filament, and the light is heated. In this way, when working, the electrical energy is converted into internal energy and light energy.

Whereas, light is a form of energy that is released by atoms. It is made up of many tiny particle-like clusters that have energy and momentum but no mass. These particles are called visible photons and are the most basic unit of light.

When an electron is excited, the atom releases a visible photon.

The wavelength of the light emits depends on how much energy is released, which in turn depends on the position of the electron in its orbital. As a result, different classes of atoms release different classes of visible photons. In other words, the color of light is determined by the type of atom that is excited.

Sound waves are produced by the vibration of an object. Radio waves are emitted from antennas on top of tall towers due to the movement of electrons. Similarly, light waves are produced by the movement of atoms, molecules, and electrons in matter.

But these are the special movements of the microcosm. For example, in an incandescent lamp, an energized tungsten filament, the temperature is up to 2300. The atoms are moving violently, so that some of the electrons outside the nucleus of the atom are in an unstable orbit of high potential energy, and when they return to the orbit of low potential energy, the excess energy is released in the form of light.

In a high-pressure mercury lamp, many free electrons are produced by discharging, and the electrons are accelerated by electricity at a much faster rate than a bullet. When this electron collides with the mercury atom, it transfers energy to the mercury atom to excite it to reach an unstable high-energy state. In the same way, light is emitted when it spontaneously "falls" from the high-energy state and returns to the low-energy state.

The bulb glows due to the current passing through the small bulb.

A device that can provide a continuous current such as a dry cell is called a power supply, while a device that uses electricity to work like a light bulb is called an electrical appliance. In order for the current to pass through the bulb, the power supply and the consumer must be connected with wires to form a circuit. In order to control the light and extinguishing of the small bulb, we install electric keys.

Electric keys are commonly known as switches.

The dry battery is a commonly used power source, and its shell is a zinc cylinder, which is the negative electrode of the dry battery, which contains chemicals, which is represented by a negative sign, and the carbon rod with a copper cap in the middle of the zinc cylinder is the positive electrode of the dry battery, which is represented by a positive sign. After the circuit is connected, the current comes out of the positive electrode of the dry battery, passes through the tungsten wire of the bulb, and flows back to the negative electrode of the dry battery. In addition, there are batteries and silver-zinc batteries, the batteries are made of many lead plates in the electrolyte, and the negative electrode of the silver-zinc battery is also zinc, and the positive electrode is silver oxide.

When there is a power supply in the circuit, the electrical bond is closed, and the circuit is the path, the small bulb emits light; When the electric key is broken and there is no current in the circuit, the circuit is called an open circuit. There is also a situation where the wire is connected between the positive and negative poles of the power supply, and the circuit will be very strong, which will cause the wire and the power supply to heat up and damage the power supply, which is called a short circuit. If the wire is directly connected to both ends of the electrical appliance, the current does not pass through the electrical appliance, but flows directly through the wire, which is called a short circuit of the electrical appliance.

I hope I can help you with your doubts.

The light emitting of the bulb belongs to physical change, because when the bulb is energized, the tungsten filament in the bulb will be buried in bright light at a high temperature of more than 3000, but the tungsten filament and the filled gas do not undergo a chemical reaction, and no new substances are generated, so it is not a chemical change, it is a physical change.

The light bulb was invented by Henri Goebbels. Edison just found a suitable material on the basis of the original guess celery and invented the incandescent lamp with strong practicality.

The accurate technical name of the bulb is incandescent lamp, which is a lamp that emits light by applying electricity and using resistance to heat a thin wire to incandescent.

The most common function of a light bulb is lighting. With the development of society, the use of light bulbs has also played a different role, and gradually began to have functional lamps for different purposes such as "automobiles, landscaping, decoration" and so on.

The light bulb glows is a physical change. When the bulb is energized, the current is converted into heat energy through the filament and electrical energy, so that the temperature is as high as 3000 or more, and the tungsten filament produces white light at high temperatures. However, the tungsten filament does not react chemically with the filled gas, and no new substances are formed, so it is not a chemical change.

Examples of physical changes:

The basic three-state change of matter, and no new substance is produced, so it belongs to physical change. Deliquescence of inorganic salts and alkalis such as NAOH, melting of ice, crushing of bile alum, etc. For example, molten iron is cast into an iron pot, which involves the combination of carbon and iron elements and new molecules (generally forming Fe3C), which is not counted as a physical change, but if it is 100% pure iron, casting into an iron pot will not undergo chemical changes and no new phases will be generated.

After searching and browsing the relevant information, we also know that graphite turning into diamond under certain conditions is a chemical change, because it becomes another element. But there are also some allotropes that are transformed by physical changes, such as monoclinic sulfide and orthorhombic sulfur.

Before and after the physical change, the type, composition, and chemical properties of the substance remain the same. The essence of this type of change is a change in the state of aggregation of molecules (separation distance, speed of motion, etc.), resulting in a change in the shape or state of the substance. Physical changes express the physical properties of the substance.

Physical change is fundamentally different from chemical change. The flame color reaction is a physical change. The flame reaction is a change in the energy level of electrons inside the atoms of a substance, which is commonly known as the change in the energy of electrons in an atom, and does not involve a change in the structure and chemical properties of matter.