What is the coldest color of fire?
The colder part of a diffusion (incomplete combustion) flame will be red, transitioning to orange, yellow, and white as the temperature increases as evidenced by changes in the black-body radiation spectrum.
The lowest recorded cool flame temperatures are between 200 and 300°C; the Wikipedia page references n-butyl acetate as 225°C. You can read a lot more about cool flames on that page.
Blue flames are the hottest, followed by white. After that, yellow, orange and red are the common colours you'll see in most fires.
Flame colour meaning can be indicative of temperature, type of fuel or the completeness of combustion. For example, a blue flame is the hottest followed by a yellow flame, then orange and red flames. Hydrocarbon gases burn blue whilst wood, coal or candles burn yellow, orange or red.
Generally, the color of a flame may be red, orange, blue, yellow, or white, and is dominated by blackbody radiation from soot and steam.
Hotter fires burn with more energy which are different colors than cooler fires. Although red usually means hot or danger, in fires it indicates cooler temperatures. While blue represents cooler colors to most, it is the opposite in fires, meaning they are the hottest flames.
It's uncommon on Earth, but it does happen. The differences between "hot" and "cold" varieties are fairly plain: When a cold flame ignites, it might only kick out heat hotter than its surroundings by a few tens of degrees Celsius, while a hot flame spikes the temperature by thousands.
Thus the colors of light with the highest frequency will have the hottest temperature. From the visible spectrum, we know violet would glow the hottest, and blue glows less hot. As this is true for all forms of light, its application is seen in fire, or when an object is heated up.
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The color blue indicates a temperature even hotter than white. Blue flames usually appear at a temperature between 2,600º F and 3,000º F. Blue flames have more oxygen and get hotter because gases burn hotter than organic materials, such as wood.
Is black fire real?
This is black fire. When you mix a sodium street light or low-pressure sodium lamp with a flame, you'll see a dark flame thanks to the sodium and some excited electrons. “It's strange to think of a flame as dark because as we know flames give out light, but the sodium is absorbing the light from the lamp.
Not hot at all. According to the University of Illinois Department of Physics the term fire is used to describe something that's burning and giving off light therefore there can't be black fire since "black" means that no visible light is coming from it and thus no heat.
The color of the flames is apart of temperature affected also by the type of fuel used (i.e. the material being burned) as some chemicals present in the material can taint flames by various colors. Blue-violet (purple) flames are one of the hottest visible parts of fire at more than 1400°C (2552°F).
When we talk about blue light being cool and red light being warm, we are referring to something very different from color temperature. We are using these colors to describe our perceptions or to convey moods. Counterintuitively, blue-hot is actually hotter than red-hot.
Blue lava, also known as Api Biru, and simply referred to as blue fire or sulfur fire, is a phenomenon that occurs when sulfur burns. It is an electric-blue flame that has the illusory appearance of lava.
A flame's color depends on two things: the temperature of the flame and the material being burned. The main color in the flame changes with the temperature. Something is “red hot” from 977 degrees Fahrenheit to 1,830 degrees. Orange flames burn at 2,010 to 2,190 degrees.
From the surface, snow and ice present a uniformly white face. This is because almost all of the visible light striking the snow or ice surface is reflected back, without any preference for a single color within the visible spectrum.
Yellow flames such as those from a campfire or candle, come from the burning of relatively "dirty" fuels, in the sense that the fuel is not completely converted into carbon dioxide and water, but leaves little bits of unburned carbon. Those bits of carbon get hot and glow, making the yellow light that you see.
Chemicals and Compounds Can Affect Flame Color
As copper heats up, it absorbs energy that's manifested in the form of a green flame. A pink flame, on the other hand, indicates the presence of lithium chloride. And burning strontium chloride will create a red flame.
Copper sulfate dissolves in rubbing alcohol and produces pure green fire. The copper compound is not consumed by the fire, so adding more fuel maintains the color. This compound also works on a wood or charcoal fire, although expect a rainbow of colors from the interaction with other chemicals in the fuel.
How hot is purple lightning?
Up to 50,000 degrees Fahrenheit, maybe even more.
Theoretically yes but it must be extremely cold like a billionth of a kelvin and billions times the pressure of earth because fire is a ionic plasma that takes in oxygen fills a electron since it's so ionic and get's a atom from it's fuel and binds it with oxygen.
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The findings, published today in Nature, confirm the existence of “superionic ice,” a new phase of water with bizarre properties. Unlike the familiar ice found in your freezer or at the north pole, superionic ice is black and hot. A cube of it would weigh four times as much as a normal one.
White Heat: 2,400 Degrees F And Up.
Lithium chloride: Makes a pink flame. Copper sulfate: Makes a green flame. Sodium chloride: Makes an orange flame.
Deep red fire is about 600-800° Celsius (1112-1800° Fahrenheit), orange-yellow is around 1100° Celsius (2012° Fahrenheit), and a white flame is hotter still, ranging from 1300-1500 Celsius (2400-2700° Fahrenheit). A blue flame is the hottest one of all, ranging from 1400-1650° Celsius (2600-3000° Fahrenheit).
A cool flame or invisible flame is a flame having a maximal temperature below about 400 °C (752 °F). It is usually produced in a chemical reaction of a certain fuel-air mixture. In contrast to an ordinary flame, the reaction is not vigorous and releases little heat, light, or carbon dioxide.
To achieve a cold fire, you need to keep the gas around it cold, while retaining the freely moving energetic electrons. The way you achieve this is to take away the thermal energy of the gas, a gas that ionizes quickly, gives up free electrons with ease and has a high thermal conductivity at the same time.
Fire management techniques known as “cultural burns” or “cool burns” have long been practiced by Australian Indigenous people [4], where for tens of thousands of years, Indigenous Australians have actively managed the Australian savanna using cool burning techniques [2].
How hot is red hot?
Colour | Temperature [°C] | Temperature [°F] |
---|---|---|
Red: Just visible | 525 | 977 |
Dull red | 699 | 1,290 |
Dull cherry red | 800 | 1,470 |
Full cherry red | 900 | 1,650 |
The colour provides a fundamental piece of data in stellar astrophysics—the surface temperature of the star. The hottest stars are blue and the coldest are red, contrary to the use of colours in art and in our daily experience.
Most types of wood will start combusting at about 300 degrees Celsius. The gases burn and increase the temperature of the wood to about 600 degrees Celsius (1,112 degrees Fahrenheit).
Fires can have shadows because they contain hot air and soot, and not because they contain light.
Flames consist primarily of carbon dioxide, water vapor, oxygen and nitrogen. If hot enough, the gases may become ionized to produce plasma. Depending on the substances alight, and any impurities outside, the color of the flame and the fire's intensity will be different.
You get a blue gas flame with a hydrocarbon gas when you have enough oxygen for complete combustion. When you do have sufficient oxygen, the gas flame appears blue because complete combustion creates enough energy to excite and ionize the gas molecules in the flame.
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Temperature. The hottest part of a candle flame is just above the very dull blue part to one side of the flame, at the base. At this point, the flame is about 1,400 °C (2,550 °F).
The colour of the light depends upon the metal (lithium(I) gives a magenta red-pink flame, calcium an orange red flame, potassium a lilac flame, strontium a crimson red flame, copper(II) gives a blue or green flame and sodium(I) gives a yellow flame).
Why is blue fire hotter?
Blue flames typically feature more oxygen and are usually hotter than orange flames. The gases that burn with such flames feature hotter temperatures than organic materials, such as wood.
So the reason we use red for the hot tap and blue for the cold tap is explained by our objective test. This crossmodal association is likely learnt via our encounters with colours and temperatures that correlate in the natural world.
Think of the color wheel as a clock where every hour marks a new color family. Absolutely warm and cool colors can be found at 0 (red – the warmest color) and 180 (cyan – the coolest color) degrees.
The color of the sun is white. The sun emits all colors of the rainbow more or less evenly and in physics, we call this combination "white". That is why we can see so many different colors in the natural world under the illumination of sunlight.
The volcano contains large amounts of pure sulfur, which emits an icy violet color as it burns, filling the air with toxic fumes. The picture above was taken in a low lying field in Ethiopia. So what we're seeing here is not actually blue lava, but normal, bright purple lava, surrounded by blue flames.
No. Lava, when being forced from the earth, is between 700 and 1200 Celsius or roughly 1300 to 2200 Fahrenheit. The hottest fire is from an Oxyacetylene torch, also called a cutting torch, that reaches roughly 3000 Celsius or about 5400 Fahrenheit.
It burns as an electric-blue flame that has the illusory appearance of lava. This is a rare phenomenon in the world with the Kawah Ijen volcano in Indonesia being the world's most well-known and documented in the world.
Thus the colors of light with the highest frequency will have the hottest temperature. From the visible spectrum, we know violet would glow the hottest, and blue glows less hot. As this is true for all forms of light, its application is seen in fire, or when an object is heated up.
It's uncommon on Earth, but it does happen. The differences between "hot" and "cold" varieties are fairly plain: When a cold flame ignites, it might only kick out heat hotter than its surroundings by a few tens of degrees Celsius, while a hot flame spikes the temperature by thousands.
This is black fire. When you mix a sodium street light or low-pressure sodium lamp with a flame, you'll see a dark flame thanks to the sodium and some excited electrons. “It's strange to think of a flame as dark because as we know flames give out light, but the sodium is absorbing the light from the lamp.
Is purple fire real?
The color of the flames is apart of temperature affected also by the type of fuel used (i.e. the material being burned) as some chemicals present in the material can taint flames by various colors. Blue-violet (purple) flames are one of the hottest visible parts of fire at more than 1400°C (2552°F).
Not hot at all. According to the University of Illinois Department of Physics the term fire is used to describe something that's burning and giving off light therefore there can't be black fire since "black" means that no visible light is coming from it and thus no heat.
Chemicals and Compounds Can Affect Flame Color
As copper heats up, it absorbs energy that's manifested in the form of a green flame. A pink flame, on the other hand, indicates the presence of lithium chloride. And burning strontium chloride will create a red flame.
When temperatures approach 2,400º F to 2,700º F, flames appear white. You can see these differences for yourself by observing a candle flame or a piece of burning wood. The part of the flame closest to the candle or the wood will usually be white, since the temperature is usually greatest near the fuel source.
A cool flame or invisible flame is a flame having a maximal temperature below about 400 °C (752 °F). It is usually produced in a chemical reaction of a certain fuel-air mixture. In contrast to an ordinary flame, the reaction is not vigorous and releases little heat, light, or carbon dioxide.
The NXP ColdFire is a microprocessor that derives from the Motorola 68000 family architecture, manufactured for embedded systems development by NXP Semiconductors.
Some fires (flames) are hotter or colder than others. Acetylene burns at 3100*C in oxygen while 'Cool' flames, resulting from certain chemical reactions can exist down to 400*C. but a human would still experience that 'cooler' temperature as quite hot. So, from a human perspective, THERE ARE NO 'COLD' FIRES OR FLAMES.
Ethanol fires are nearly invisible and burn incredibly hot.
Fires can have shadows because they contain hot air and soot, and not because they contain light.
Copper sulfate dissolves in rubbing alcohol and produces pure green fire. The copper compound is not consumed by the fire, so adding more fuel maintains the color. This compound also works on a wood or charcoal fire, although expect a rainbow of colors from the interaction with other chemicals in the fuel.
Is lava hotter than blue fire?
The hottest fires are from oxyacetylene torches (about 3000 degrees Centigrade) that combine oxygen and gas to create pinpoint blue flames. The temperature of lava when it is first ejected from a volcanic vent can vary between 700 and 1,200 degrees C (1,300 to 2,200 F).
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The colour of the light depends upon the metal (lithium(I) gives a magenta red-pink flame, calcium an orange red flame, potassium a lilac flame, strontium a crimson red flame, copper(II) gives a blue or green flame and sodium(I) gives a yellow flame).