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The terms light source and illuminant have precise and different meanings. A light source is a physical emitter of radiation such as a candle, a tungsten bulb, and natural daylight. An illuminant is the specification for a potential light source. All light sources can be specified as an illuminant, but not all illuminants can be physically realized as a light source.
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What is the difference between phosphorescent and fluorescent materials?
Phosphorescent materials continue to emit light after the excitation source is removed, while fluorescent materials only emit light while the excitation source is present.
What is the difference between phosphorescence and fluorescence?
Phosphorescence and fluorescence are both types of light emission, but they differ in how long they last. Fluorescence is a quick emission of light that stops as soon as the light source is removed, while phosphorescence continues to emit light for a period of time after the light source is removed.
What is the difference between fluorescent and phosphorescent materials?
Fluorescent materials absorb and emit light almost instantly, while phosphorescent materials absorb and emit light with a delay, continuing to glow after the light source is removed.
Distinguish between a luminous source and an illuminated source?
A luminous source produces its own light, like the sun or a light bulb. An illuminated source does not produce light but reflects light from a luminous source, such as the moon reflecting sunlight.
What is the difference between lux and watts when it comes to measuring the brightness of a light source?
Lux measures the intensity of light that reaches a surface, while watts measure the amount of power consumed by a light source. Lux indicates how bright the light appears to the human eye, while watts indicate the energy used to produce that light.
What is the difference between light and reflected light?
Source light is light coming directly from a light source/emitter (i.e. a light bulb, the sun, stars, etc.). Reflected light is light coming indirectly from the light source/emitter. That could be reflected, refracted light, etc.
Difference between shadow and reflection?
A shadow is the absence of light, a reflection is just that, the reflection of light. So a shadow comes from blocking a light source, a reflection comes from the bouncing of light of one source and on to another
Is the brightness of glow in the dark materials affected by the light source used to make them glow or only by the intensity of the light Does the light source?
It depends on the luminescence of the materials. I see no difference between "the light source" and "the intensity of the light". Please restate and/or clarify the question.
What is the difference between a beam of light and a ray of light?
A light beam or beam of light is a narrow cone of light energy radiating from a small source. In optics, a ray is an idealized narrow beam of light.
What is the difference between phosphorescent and fluorescent materials?
Phosphorescent materials continue to emit light after the excitation source is removed, while fluorescent materials only emit light while the excitation source is present.
What makes a dc bulb different from an ac bulb?
The voltage source that is applied to them is the difference between AC and DC light bulbs.
What is the difference between phosphorescence and fluorescence?
Phosphorescence and fluorescence are both types of light emission, but they differ in how long they last. Fluorescence is a quick emission of light that stops as soon as the light source is removed, while phosphorescence continues to emit light for a period of time after the light source is removed.
What is the difference between infrared light and visible light ultraviolet light?
The difference is their wavelengths.
What is the difference between a light source and a reflector provide examples for each?
A light source generates and emits its own light. A reflector reflects light (i.e. light bounces off of it) from another source. Examples of light sources: The sun, the stars, a lightbulb, a flame, a red-hot piece of metal. Examples of reflectors: The moon, the planets, the ground lit by the sun.
What is the difference between a pool table light and a billiards table light?
There is no difference.
What is the difference between luminescent and fluorescent materials?
Luminescent materials emit light without needing an external light source, while fluorescent materials absorb light and then emit it back at a different wavelength.
Difference between light and electricity?
Difference?? There is no relation.
