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Glenn
Does the inverse square law apply to laser/coherent light?
Originally posted by Integral
I believe that r-2 laws only apply to sources which emit energy into a significant portion of a sphere.
You have to also be given the divergence angle.Originally posted by kishtik
Then how can we determine the radius of a laser beam with a given distance and starting radius?
I had no idea about that but now I think that shouldn't be hard with the div. angle. We can solve it analitically or using direct proportion. Am I wrong?Originally posted by chroot
You have to also be given the divergence angle.
The Inverse Square Law for Laser/Coherent Light is a physical law that states that the intensity of light from a point source is inversely proportional to the square of the distance from the source.
The Inverse Square Law states that as the distance from the source increases, the intensity of the laser beam decreases. This means that the further away the laser beam is from its source, the dimmer it will appear.
The mathematical formula for the Inverse Square Law is I = P/A, where I is the intensity of light, P is the power of the light source, and A is the area over which the light is spread.
The Inverse Square Law is an important factor in laser safety as it helps determine safe distance guidelines for working with lasers. The intensity of the laser beam decreases with distance, so the further away someone is from the laser, the less likely they are to experience any harmful effects.
There are certain situations where the Inverse Square Law may not apply, such as when the light is not emitted from a point source or when there are obstructions that affect the light's intensity. However, in most cases, the Inverse Square Law is a reliable principle for understanding the behavior of laser/coherent light.