0
What are two examples of a luminous source that produces a line spectrum?
Wiki User
∙ 11y ago
1. Glow discharge lamp
2. Electrode discharge in spectrometry
Wiki User
∙ 11y ago
Wiki User
∙ 10y agothe sun and a lamp
Add your answer:
Earn +20 pts
Theoretically What is the maximum possible luminous efficacy?
683 lm/w for a pure monochromatic green light source at a single wavelength of 555 nm. This is because a lumen (lm) is measured according to sensitivity of the human eye and the eye is most sensitive at 555 nm. For a wide-spectrum "white" light source, the theoretical maximum is about 280 lm/W if the luminous energy is evenly spread across the visible spectrum. The number can vary slightly depending on the limits chosen for the visible spectrum and how white light is defined.
What are two examples of illuminated and luminous objects?
Luminous objects are things that generate their own light such as The Sun and Fireflies. Illuminated objects are things that reflect light that has come from another source, things like The Moon or anything in your room when you switch on your light.
What energy do luminous objects give off?
Luminous intensity is measured in Candelas. If a light source emits one candela of luminous intensity uniformly across a solid angle of one steradian, its total luminous flux emitted into that angle is one lumen. Alternatively, an isotropic one-candela light source emits a total luminous flux of exactly 4π lumens. The lumen can be thought of casually as a measure of the total "amount" of visible light in some defined beam or angle, or emitted from some source. A standard North American 100 watt incandescent light bulb emits 1500-1700 lumens,[1] while a standard European 230 V model emits 1200-1400 lm.[2] A 100 watt high-pressure sodium vapor lamp emits around 15,000 lumens.[3] The number of lumens produced per watt of power consumed is the wall-plug luminous efficacy of the source.
What percentage Pakistan produces electricity from thermal source?
About 70%
What source of energy produces steam?
Heat, combined with water
What is a luminous light source?
Luminous light is a light source but another name for it.
Definition of luminous and non-luminous sources of light?
what is luminous, non luminous and illuminous source of light.
What is non luminous source?
It is a source which does not produce light.
Is a glow in the dark ball luminous or illuminated?
It is a source of light, hence luminous.
Theoretically What is the maximum possible luminous efficacy?
683 lm/w for a pure monochromatic green light source at a single wavelength of 555 nm. This is because a lumen (lm) is measured according to sensitivity of the human eye and the eye is most sensitive at 555 nm. For a wide-spectrum "white" light source, the theoretical maximum is about 280 lm/W if the luminous energy is evenly spread across the visible spectrum. The number can vary slightly depending on the limits chosen for the visible spectrum and how white light is defined.
What are two examples of illuminated and luminous objects?
Luminous objects are things that generate their own light such as The Sun and Fireflies. Illuminated objects are things that reflect light that has come from another source, things like The Moon or anything in your room when you switch on your light.
What is lumens per watt could you give a brief definition about lumens per watt?
Luminous efficacy is a figure of merit for light sources. It is the ratio of luminous flux (in lumens) to power (usually measured in watts). As most commonly used, it is the ratio of luminous flux emitted from a light source to the electric power consumed by the source, and thus describes how well the source provides visible light from a given amount of electricity.This is also referred to as luminous efficacy of a source.
What are non-luminous source of light?
light which do not give out their own light
What is the difference between a lumen and a candela?
The candela measures luminous intensity, whereas the lumen measures luminous flux. In simple terms, you can think of luminous intensity as being similar to 'brightness', while luminous flux is similar to the rate at which light leaves its source.
A pulsar is a rapidly rotating what?
A pulsar is a rapidly rotating neutron star. It produces flashing signals, either in the visible light spectrum, or the radio spectrum, or both. When radio pulsars were first discovered, the period of the signal was so precise, it was originally thought that they were radio signals from an alien source.
Is a torch luminous or non luminous?
At first light it DOES sound a bit confusing. First, the definition of the term 'NON-LUMINOUS'; 'Not capable of PRODUCING light but can be capable of REFLECTING light from another source'. For instance, our MOON is NON-LUMINOUS as it REFLECTS light from the Sun. The SUN is LUMINOUS as it produces light that is REFLECTED off the surface of the moon. And so, LUMINOUS means capable of PRODUCING light. Now closely examine your flashlight. The BATTERIES produce electrical energy which is transferred to the BULB which emits light, thus LUMINOUS. The tiny little BULB emits quite a lot of light for its small size. However, the bulb is contained within a concave silvered cone which REFLECTS,(NON-LUMINOUS) gathers and channels the emitted light from the BULB (LUMINOUS) into a BEAM which ILLUMINATES whatever you are pointing the flashlight at. Our cameras would be just paperweights if there were no NON-LUMINOUS surfaces for the light to REFLECT off of, back into the camera lens, onto the 'plate' thus etching the image. For example, take a photograph in the dark without the flash and what do you get. No LUMINOUS, no NON-LUMINOUS. And so there we have LUMINOUS and NON-LUMINOUS, ILLUMINATING our lives. Enjoy! :)
Is the temperature of a luminous flame greater or less than that of a nonluminous flame?
a non-luminous flame- when the air hole of the Bunsen Burner is open"when the air hole is open, more oxygen can enter the burner; therefore, hotter flame will be produced."its color is transparent or blueBlue flames are the hottest flamesa luminous flame is produced when the air hole is closed.."if the air hole is closed, oxygen cannot enter the burner; therefore, least hotter because the combustion is not fully complete with least oxygenA luminous flame has an outer of orange color and an inner of blue.Luminous flames emits more light than non-luminous flames.three things to produce flame1.fuel2.oxygen3.friction or source of sparkLuminous objects emit light. The sun is luminous; the moon is non-luminous.
