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The amplitude of a wave from a point source decreases as the inverse square of the distance fron the source?
Wiki User
∙ 14y ago
yes... its true...the inverse square law is universal. it can be applied to gravity between two objects, the electric force between 2 charges etc...
Wiki User
∙ 14y ago
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What does the inverse square law state?
any physical law stating that some physical quantity or strength is inversely proportional to the square of the distance from the source of that physical quantity.
What is inverse square law and an example?
inverse square law is the law that states the intensity of the light, sound etc is directly proportional to 1/ distance squared meaning the further you are from the source the less intense the light etc will be. e.g. an object 1m away from a light source 1/1^2=1 , 2m 1/2^2= 1/4 and so forth
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.
How much weaker will a sound be at a distance of 2 meters from the source compared to its intensity at 1 meter?
Yes, it will be!
What are applications of space vector modulation?
Because there's sparking in DC motors, they are inherently less efficient than say AC motors are, The trick with AC motors is that they run primarily at the frequency of their power source. What happens when the power source can change it's frequency and amplitude? The motor can behave as well as any DC motor.
How do the amplitude and the intensity of surface water waves vary with the distance of the source?
physics
Is the greater the distance from a charged object the stronger the electronic field?
No, the strength of the electric field decreases with distance from a charged object. The electric field follows an inverse-square law, meaning it decreases with the square of the distance from the source charge. So, the closer you are to the charged object, the stronger the electric field.
What is the inverse square law of energy?
Some physical effect is reduced in proportion to the square of the distance from it's source. It applies to most forces or energies that radiate from a single point, like a light bulb. If you move twice as far from the light source, you will receive only a quarter as much light. And if you move three times as far from the bulb, you will receive only 1/9 as much. 1/4 is the inverse of 22 and 1/9 is the inverse of 32. If you are using the acoustics it is different, because the sound pressure is inversely proportional to the distance (1/r) from the source. That is the inverse distance law. Scroll down to related links and look at "Inverse Distance Law".
How avoid to noise?
Build a wall around the noise source. Go far away from the sound source. Measure the sound pressure level at the distance where your ear is and learn about the inverse distance law 1/r. Scroll down to related links and look at "The inverse distance law 1/r".
Does your distance from a sound source affect how loud the sound seems?
The sound pressure decreases with distance r in a free field (direct field). The next question is. How does the sound decrease with increasing distance? After which law? Answer: The sound pressure p diminishes with distance after the 1/r law. Sound pressure decreases inversely as the distance increases with 1/r from the sound source. The Sound pressure level (SPL) decreases by (−)6 dB per doubling of distance from the source to 1/2 (50 %) of the sound pressure initial value. Sometimes it is said, that the sound decreases with with 1/r², the inverse square law. That is really wrong. Scroll down to related links and look at "Damping of sound level with distance".
How to reduce noise?
Build a wall around the noise source. Go far away from the sound source. Install accoustic insulation. Learn to use the inverse distance law 1/r. Scroll down to related links and look at "The inverse distance law 1/r".
The pitch of a sound is the distance from the sound source?
The pitch of a sound means the frequency. That stays constant with distance. You mean the sound pressure level that decreases with distance.
How is the intensity of a sound related to the distance between the source and the receiver?
The intensity of a sound will decrease according to an inverse square law.
Decibels in ear?
Never forget to tell the distance of the measuring microphone (at the place of your ear), from the the sound source because the closer you are to the sound source the louder it will be.The sound pressure level decreases by 6 decibels per doubling of distance from the source to 1/2 (50 %) of the sound pressure initial value.The sound pressure decreases inversely as the distance increases with 1/r from the sound source.
What is the effect of distance on sound?
The sound pressure decreases with distance r in a free field (direct field).The next question is. How does the sound decrease with increasing distance? After which law?The sound pressure p diminishes with distance after the 1/r law. Sound pressure decreases inversely as the distance increases with 1/r from the sound source. The Sound pressure level (SPL) decreases by (−)6 dB per doubling of distance from the source to 1/2 (50 %) of the sound pressure initial value.Sometimes it is said, that the sound decreases with with 1/r², the inverse square law. That is really wrong.Scroll down to related links and look at "Damping of sound level with distance".p2 / p1 = r1 / r2 and p2 = p1 x r1 / r2p1 = sound pressure 1 at reference distance r1 from the sound source.p2 = sound pressure 2 at another distance r2 from the sound source.Scroll down to related links and look at "How does the sound or the noise decrease with distance?"
What happens to the intensity of light the further it is away from the source?
Light intensity is like gravitation. It changes in accordance with the inverse square law. What's an inverse square? if our number is.......................................... 5 ORIGINAL NUMBER the inverse of this number is.................... 1/5 INVERSE and the inverse SQUARE of this number is 1/52 or 1/25. INVERSE SQUARE But how does this answer your question? As a light source increases its distance from an object (moves farther away) its intensity changes, it becomes less intense. How much less intense? Think of the inverse square law! If your light source moves twice as far away (distance increases by a factor of 2) it becomes 1/4th as intense. (1/4th is the inverse square of 2) Think of shining a flashlight on a tile floor. If you are 5 cm (very close) to the floor, the light from the flashlight will cover one tile and be very intense. However, if you move twice (2 times) as far away, (now you would be 10cm from the floor) you would notice that the same light streaming from the flashlight can now cover four whole tiles! Two times the distance away now covers four whole tiles! Each tile is therefore receiving 1/4th the intensity of the light. Taking it one step further, if you were to move 4 times away (now you are 20cm from the floor)...the light from your flashlight could cover 16 tiles! So, each tile would be recieveing 1/16th the intensity of light. Like I said in the beginning, the same is true when you are working with the Universal Law of Gravitation, so, if you understand light intensity, you will also understand gravitation!
What is the law inversion of Energy?
Some physical effect is reduced in proportion to the square of the distance from it's source. It applies to most forces or energies that radiate from a single point, like a light bulb. If you move twice as far from the light source, you will receive only a quarter as much light. And if you move three times as far from the bulb, you will receive only 1/9 as much. 1/4 is the inverse of 22 and 1/9 is the inverse of 32. If you are using the acoustics it is different, because the sound pressure is inversely proportional to the distance (1/r) from the source. That is the inverse distance law. Scroll down to related links and look at "Inverse Distance Law".
