0
Why does radiant heat from a radiator create heat but no visible light and why does a light bulb create visible light but can't heat much at all even if there are many lamps in a room?
Wiki User
∙ 11y ago
If you don't think light bulbs, at least the incandescent kind, can heat much, I'd like to invite you to visit my stage, where I can put several tens of thousands of watts on you and we'll see about "can't heat much." Bring a towel.
That aside... it has to do with the black body/cavity radiation curve. A radiator doesn't emit visible light because it's not hot enough; you need to reach about 900 degrees Fahrenheit to get much of anything in the visible light region. The filament in an incandescent bulb gets up to around 2700 K (almost 4500 degrees Fahrenheit).
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
What forms of an energy does an lamps give out?
The answer is Radiant energy. Infrared light has properties of radiant energy in the form of either a wave or a particle, but not both at the same time, depending on how you look at it.
Which electromagnetic waves are produced by the sun?
Visible light because some of the energy that reaches the earth from the sun is visible light. The visible light from the sun is white light. White light is visible light of all wavelengths combined. Light from lamps in your home as well as from the fluorescent bulbs in your school is also white light.
Why is the street light yellow not white?
They are yellow because they are sodium lamps, using sodium vapor. They are very efficient in terms of visible light output per watt.
How do adjustable height lamps work?
The working principle behind the adjustable height lamps is very simple. The adjustable height lamps enables the users to adjust the height of the lamps to their preferred height.
What are the main benefits of anglepoise lamps?
The main benefits of anglepoise lamps are the low economic cost they have. Moreover, one can change these lamps without a lot of cost for his household.
What gives off radiant energy on earth?
candle flames, lightbulbs, gas lamps......
What forms of an energy does an lamps give out?
The answer is Radiant energy. Infrared light has properties of radiant energy in the form of either a wave or a particle, but not both at the same time, depending on how you look at it.
Less then a few present of the energy supplied to 100w lamp appears in the form of visible light What happens to rest of it What could be done to increase this percentage?
The remaining energy is radiated as heat. Making the filament hotter should increase the percentage of visible light. I believe some lamps (like halogen lamps) do this. But the real solution is to use other technologies - like fluorescent lights, or LEDs.The remaining energy is radiated as heat. Making the filament hotter should increase the percentage of visible light. I believe some lamps (like halogen lamps) do this. But the real solution is to use other technologies - like fluorescent lights, or LEDs.The remaining energy is radiated as heat. Making the filament hotter should increase the percentage of visible light. I believe some lamps (like halogen lamps) do this. But the real solution is to use other technologies - like fluorescent lights, or LEDs.The remaining energy is radiated as heat. Making the filament hotter should increase the percentage of visible light. I believe some lamps (like halogen lamps) do this. But the real solution is to use other technologies - like fluorescent lights, or LEDs.
Between fluorescent and incandescent which saves electricity?
Fluorescent lamps deliver more visible light than incandescent lamps using electric power at the same rate. (But incandescent lamps deliver more heat. Just depends on what purpose you're using light bulbs for.)
Is the great wall of china the only visible thing from space?
No, you can see many things. such as street lamps, mount Everest.
When will be the Mercury lamps will be stopped in market?
If you are referring to fluorescent and CFL lamps, it can never be totally eliminated. These are mercury vapor arc lamps using a phosphor to turn the UV to visible light. They have reduced the mercury dramatically, but it can't be totally eliminated. If all fluorescent and CFL lamps were banned and lighting was all converted to LED then use of mercury could be stopped. However most LED lamps cost at least ten times what CFL lamps cost.
Where can you go to find unique floor lamps?
Multiple retailer outlet stores carry different brands and kinds of lamps since many different companies create them. Browse the internet for lamps that catch your eye and consider the cost.
What type of electromagnetic radiation is used in street lights?
Street lamps are designed to emit visible light. Some of them do this by first emitting ultraviolet radiation that is converted to visible light by a coating on the inside of the light bulb.
What was the best way to create light at night before the light bulb was invented?
Before the light bulb was invented in the late 1800s by Thomas Edison, people used candles, fire, oil lamps, or gas lamps or lights to create light while it was dark.
Which electromagnetic waves are produced by the sun?
Visible light because some of the energy that reaches the earth from the sun is visible light. The visible light from the sun is white light. White light is visible light of all wavelengths combined. Light from lamps in your home as well as from the fluorescent bulbs in your school is also white light.
What wavelengths are in heat lamps?
Although they do have some visible light, heat lamps skew towards the infrared end of the spectrum. Heat lamps are designed to emit light in the Near Infrared (.7µm-1.3µm), Middle Infrared (1.3µm-6µm), Far Infrared (6µm-40µm), and Far-Far Infrared (40µm-1000µm)
Why neon lamps are used in charging and discharging experiment?
Neons draw very little current. This allows for small charges to be visible, before the charge disappears.
