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Why does the intensity decrease with the square of the distance from a point source?
Intensity is defined as energy per unit area. As we move away from the point source, the area over which the energy distributes is generally spherical or hemispherical. The area of a sphere or hemisphere increases proportional to the square of radius, where the radius in this case is the distance from the point source. Thus Intensity, which is inversely proportional to area, decreases with the square of distance.
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Why does the intensity of light decrease as the distance from the source increases?
The intensity of light decreases with distance due to the spreading out of light waves over a larger area. This phenomena is a result of the inverse square law, which states that the intensity of light is inversely proportional to the square of the distance from the source. As light spreads out, it becomes less concentrated, resulting in a decrease in intensity.
How does distance affect intensity?
Distance affects intensity by following the inverse square law, which states that as distance from a source increases, the intensity of the source decreases by the square of the distance. This means that the further you are from a source of intensity, the weaker the intensity will be.
Tripling the distance from a constant intensity point will cause the illumination to?
Decrease by a factor of 9. The illumination at a point is inversely proportional to the square of the distance from the source. By tripling the distance, the intensity will decrease by 9 times (3^2 = 9).
How does light intensity vary with distance form the source?
Light intensity decreases as distance from the source increases. This is because light spreads out in all directions as it travels, causing the same amount of light to be distributed over a larger area the further it travels. This decrease in light intensity follows an inverse square law, meaning that the intensity decreases proportionally to the square of the distance from the source.
Does sound Intensity decrease linearly with distance?
No, it follows the inverse square law. That is, the intensity is inversely proportional to the square of the distance. I2/I1 = (r1/r2)². Intensity decreases with 1/r² from increased distance, while the sound pressure decreases only with 1/r from increased distance.
What happens to the light intensity if you half the distance to the source?
The light intensity increases by a factor of four when you half the distance to the source. This is known as the inverse square law, where light intensity is inversely proportional to the square of the distance from the source.
How is the intensity of a sound related to the distance between the source and the receiver?
The intensity of a sound decreases as the distance between the source and the receiver increases. This is due to the spreading out of sound energy over a larger area as it travels further away, resulting in a decrease in the concentration of energy at the receiver.
Decreasing of Sound Intensity?
Sound intensity decreases as the distance from the source increases due to the spreading of energy over a larger area. This decrease follows the inverse square law, meaning the intensity decreases proportionally to the square of the distance. Factors like obstacles and absorption can also contribute to the attenuation of sound intensity.
What is the relationship between the intensity of radiation and the distance from the source, as described by the k square law?
The relationship between the intensity of radiation and the distance from the source, as described by the inverse square law, states that the intensity of radiation decreases as the distance from the source increases. This means that the further away you are from the source of radiation, the lower the intensity of radiation you will be exposed to.
If the distance from the light source is tripled how much does the light intensity change?
The light intensity decreases by a factor of nine when the distance from the light source is tripled. This relationship is governed by the inverse square law, which states that the intensity of light is inversely proportional to the square of the distance from the source.
What causes sound intensity to decrease?
Sound intensity decreases as it spreads out from its source due to the inverse square law, which means that as distance from the source increases, the same amount of sound energy is spread out over a larger area, leading to lower intensity. Additionally, sound absorption by materials in the environment can also cause a decrease in sound intensity.
Why intensity decreases as distance from the light source increase?
intensity increases as distance decreases. you cant explain that. scources- bill o'reily
