0
If a 72-candela light source is located at a distance of 3 meters from a surface the illuminance on the surface is?
Wiki User
∙ 16y ago
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
Wiki User
∙ 16y ago
Add your answer:
Earn +20 pts
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 field strength at a distance one Earth radius beyond the surface?
I assume you mean, of the gravitational field? The gravitational field is inversely proportional to the square of the distance. At a distance of 1 Earth radius, the distance from the center of the Earth is twice the distance at the Earth's surface; thus, the field strength is 1/4 what it is on the surface. If at the surface the field strength is about 9.8 meters per second square, divide that by 4 to get the field strength at a distance of one Earth radius from the surface.I assume you mean, of the gravitational field? The gravitational field is inversely proportional to the square of the distance. At a distance of 1 Earth radius, the distance from the center of the Earth is twice the distance at the Earth's surface; thus, the field strength is 1/4 what it is on the surface. If at the surface the field strength is about 9.8 meters per second square, divide that by 4 to get the field strength at a distance of one Earth radius from the surface.I assume you mean, of the gravitational field? The gravitational field is inversely proportional to the square of the distance. At a distance of 1 Earth radius, the distance from the center of the Earth is twice the distance at the Earth's surface; thus, the field strength is 1/4 what it is on the surface. If at the surface the field strength is about 9.8 meters per second square, divide that by 4 to get the field strength at a distance of one Earth radius from the surface.I assume you mean, of the gravitational field? The gravitational field is inversely proportional to the square of the distance. At a distance of 1 Earth radius, the distance from the center of the Earth is twice the distance at the Earth's surface; thus, the field strength is 1/4 what it is on the surface. If at the surface the field strength is about 9.8 meters per second square, divide that by 4 to get the field strength at a distance of one Earth radius from the surface.
What is the definition of vertical distance?
The amount of separation between two horizontal surface/Plane
Name 2 factors the affect the distance taken for a toy car to stop after rolling down a ramp?
One factor is the height of the ramp. The higher the height of the ramp the further the car travels. Another factor is the surface of the ramp. With a rough surface on the ramp e.g sand paper the car travels a short distance. With a lubricated surface on the ramp e.g Vaseline the car will travel a very long distance.
What makes water pile up a short distance above a containers rim?
Surface tension.
If a 72 candela light source is located at a distance of 3m from a surface the illuminance on the surface is?
8 lux.
If a 72 candela light source is located at a distance of 3 meters from a surface the illuminance on the surface is?
a. 8 lux b. 24 lux c. 216 lux d. 648 lux
Where are short distance surface currents located?
On the surface
What is illuminance?
Illuminance is another term for luminous-flux density which defines the intensity of the luminous flux arriving at a surface, measured in lumens per square metre, which is given the special name 'lux'.
How do you calculate daylight factor in lighting design?
The most commonly used metric for measuring daylight in a building is called the "daylight factor"-expressed as a percent of available exterior daylight.Daylight factor is defined as a ratio of interior illuminance at a horizontal point in a building to the sun-shaded exterior illuminance on a horizontal surface under a fully overcast sky (a ratio of outside illuminance over inside illuminance).The higher the daylight factor, the more natural light that is available in the room.
What is a footcandle vs a footlambert?
A footcandle is a unit of measurement for illuminance on a surface, equal to one lumen per square foot. A footlambert, on the other hand, is a unit of luminance, measuring the brightness of a surface emitting or reflecting light in footlamberts.
What is illuminations?
Illuminance is another term for luminous-flux density which defines the intensity of the luminous flux arriving at a surface, measured in lumens per square metre, which is given the special name 'lux'.
Where are short distance surface current?
On the surface
1 watt equal to how many lux?
Lux is unit for measuring the illumination (illuminance) of a surface. It is the amount of light received per unit of surface area. You can' t convert watt, which is power, to Lux.
What two factors determine the distance from the free surface to the basal surface in epithelial tissue?
Speed and distance
What is the Ozone layer distance from the surface of the earth?
There is no fixed distance of the ozone from surface. It is said to be an approximate of 15 to 55 km.
What is the word for the distance through the center of a planet?
The distance from surface to surface through the center of a planet would be that planet's "diameter".
