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How does the illumination on a surface vary with distance from a light source?
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If a 72-candela light source is located at a distance of 3 meters from a surface the illuminance on the surface is?
The illuminance on the surface can be calculated bu using the formula: E=I/s2. E stands for the illuminance on the surface (in lux), I stands for theintensity of the light from the source (in candelas), and s stands for the distance from the light source to the surface (in meters). So, the answer is: 8 lux
If a 72 candela light source is located at a distance of 3m from a surface the illuminance on the surface is?
8 lux.
What is the size of the shadow and the distance of the object from the light source when a shadow is formed?
If you are using a point light source, the shadow's size is the object's size divided by the distance from the light source to the object multiplied by the distance from the light source to the shadow.
How does the distance from a page to a light bulb affect the amount of light that illuminates the paper's surface?
The intensity of light or other linear waves radiating from a source is inversely proportional to the square of the distance from the source; so an object (of the same size) twice as far away, receives only one-quarter the energy.
How does the electrons microscope work?
An electron microscope use a beam of electrons instead visible light as source of illumination.
To what is the illumination of a surface by a light source directly proportional?
The illumination on the surface would be reduced by a factor of four, thereforeif the distance from a light source is doubled, the illumination provided by the source is one fourth as great.
What is a source of illumination?
Illumination=light, so a source of light Eg. lightbulb, moon, sun etc.
What is illumination in terms of light?
when objects get lighted from other source of light it is known as illumination
What relationship between illumination and visibility?
Illumination involves a source of light being emitted. To have visibility, the human eye requires illumination of light for things to be seen. Visibility is the state of being seen. To be visible you must have a level of illumination--a source of light.
If a 72-candela light source is located at a distance of 3 meters from a surface the illuminance on the surface is?
The illuminance on the surface can be calculated bu using the formula: E=I/s2. E stands for the illuminance on the surface (in lux), I stands for theintensity of the light from the source (in candelas), and s stands for the distance from the light source to the surface (in meters). So, the answer is: 8 lux
If a 72 candela light source is located at a distance of 3m from a surface the illuminance on the surface is?
8 lux.
What cause the illumination of the Moon's surface?
It reflects the light of the sun.
What are the 3 measurable quantities of light?
The 3 measurable quantities of light are:* Luminous intensity-- which refers to the brightness of a light source* Luminous flux-- is the rate at which light is emitted from a source and strikes the surface of a whole sphere* Illumination-- is the deliberate application of light to achieve some aesthetic or practical effect
Three ( 3 ) measurable quantities of light?
The 3 measurable quantities of light are: Luminous intensity-- which refers to the brightness of a light source Luminous flux-- is the rate at which light is emitted from a source and strikes the surface of a whole sphere Illumination-- is the deliberate application of light to achieve some aesthetic or practical effect
What is the formulae to calculate illumination of light at an angle?
If n is the intensity of light whose path is perpendicular to a surface (parallel to the normal), the intensity of the same light from the same distance onto the same surface but with an angle of incidence (measured from the normal) of Θ is n cosΘ (n times the cosine of theta).
What is the size of the shadow and the distance of the object from the light source when a shadow is formed?
If you are using a point light source, the shadow's size is the object's size divided by the distance from the light source to the object multiplied by the distance from the light source to the shadow.
What is a polar curve in terms of illumination?
The term "polar curve", in relation to the subject of illumination refers to the spread of light from a source. If the curve is weak, then little illumination is provided, whilst the opposite is true for a strong curve.
