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When the object to image distance (OID) is increased, it creates what is called an "air-gap". This space between object and film reduces the amount of scatter radiation that reaches the film by allowing divergent rays travelling at steep angles to miss the x-ray film or cassette. Though it is not the same principle as using a grid-cap over a cassette, it does achieve similar results. A grid uses lead strips to absorb scatter x-ray photons while an air-gap simply provides the scatter x-rays enough space to pass by the film. These are primarily low-energy photons that would only add density to your images w/out diagnostic benefit. Increasing the OID also has two other important effects on the radiographic image: it results in magnification (a form of geometric distortion) and a loss of detail due to an larger pnenumbra. This can be demonstrated by pointing a desk lamp at a wall and making a "Shadow Puppet" using any object and observing the change in the cast shadow when you increase or decrease the distance between the object and the wall (the shadow is analogous to the radiographic image...)
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What happens to the working distance when the magnification is increased?
When magnification is increased, the working distance typically decreases. This is because higher magnification levels require the lens or object to be closer to the subject in order to achieve better focus and resolution.
What happens to the acceleration of an object if the force on the object increases?
its acceleration will be increased
What happens to the acceleration of an object's if the force on the object increase?
its acceleration will be increased
What happens to the force between charged and uncharged objects as the distance between them increased?
as the distance is increased statically induced charge in the uncharged object reduced to a minimum. Thus coulombic force which is directly proportional to the product of the charges tends to 0.
What happens to the GPE of an object if we increase the height?
If the height of an object is increased, its gravitational potential energy (GPE) also increases. This is because GPE is directly proportional to the height of the object relative to the reference point. The higher the object is lifted, the greater its potential energy due to the increased distance from the gravitational force of the Earth.
When a mechanic increases the force acting on an object what happens to the distance the object moves?
When the Force increases on an Object, the Distance it travels INCREASES, as does its Velocity.
If the OID on x ray is increased what happens?
The magnification of the object will increase.
If the force acting upon an object is increased what happens to the object's acceleration?
In that case, the acceleration will also increase.
Happens when force moves an object over a distance?
speed
If a line on a distance-time graph becomes steeper what has happened to the speed of the object?
It has increased.
What happens to the force exerted between charged and uncharged objects as the distance increases between them?
As the distance is increased, statically induced charge in the uncharged object is reduced to a minimum. Thus coulombic force which is directly proportional to the product of the charges tends to 0
What happens to the atoms of an object is thermal energy is increased?
When the thermal energy of an object is increased, the atoms within the object gain kinetic energy and vibrate more rapidly. This increased vibration causes the atoms to spread out and leads to the object expanding or changing state, such as from solid to liquid or liquid to gas.
