# Inverse Square Law Calculator

According to inverse square law, the intensity of radiation at a specified physical quantity is inversely proportional to the square of the distance of the source from the physical quantity.

## What is an Inverse Square Law Calculator?

An 'Inverse Square Law Calculator' is a free online tool that calculates the unknown term while comparing two different states of a physical quantity. In this calculator, you can enter the known terms and the unknown term will be calculated within a few seconds.

## How to Use Inverse Square Law Calculator?

Follow the steps given below to use the calculator:

**Step 1:**Enter the known values of the physical quantity and write the unknown as x in the space provided.**Step 2:**Click on**"Calculate"**.**Step 3:**Click on**"Reset"**to clear the field and enter new values.

## How to Find an Inverse Square Law Calculator?

As the intensity of the radiation is inversely proportional to the square of the distance from the source.

**(I _{1}/I_{2}) = ((d_{2})^{2} / (d_{1})^{2})**

Here I_{1} and I_{2 }are the initial and final intensity of the physical quantity.

And, d_{1} and d_{2} are the initial and final distance from the source.

**Solved Example:**

What will be the final distance between the source and physical quantity if the initial and final intensity are 8 and 64 candela respectively and the initial distance from the source is 4 m.

**Solution:**

We know that (I_{1}/I_{2}) = ((d_{2})^{2} / (d_{1})^{2})

And I_{1} = 8 candela

I_{2 }= 64 candela

d_{1} = 4m

So, (8/64) = ((d_{2})^{2} / (4)^{2})

(1/8) = ((d_{2})^{2} / 16)

d_{2} = 1.41 m

Thus, the final distance from the source is 1.41 m.

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