Inverse Square Law - 3d practical for A level Physics

This is a student controlled 3d experiment to confirm the inverse square law for radiation. All forms of radiation follow the inverse square law. That is the intensity of radiation declines as to the square of the distance from the source. In this experiment we measure the background radiation and the count rates of gamma particles hitting a detector at a range of distances. Plotting the results will verify the inverse square law.

The user can move a lead block in front of the gamma source to measure the background radiation count, and then move the detector to a range of distances from the detector and take readings of the count for a fixed period of time. The user can position him/herself anywhere within the laboratory in order to take readings from the instrumentation.

Try a practical from our Instructions on performing the experiment are included.

The package is perfect for demonstrating this experiment in front of the class but can also be used by students in a variety of ways:

• Directly to prepare for a laboratory experiment by familiarising them with the equipment to be used and the methodology of the experiment.

• As revision for an experiment that has previously been performed in the laboratory.

• For home-learning where there is no access to a laboratory.

• To make up for an experiment missed due to sickness.

• As a personal experience of an experiment normally only performed by the teacher in front of the class.

Download contains a PowerPoint giving full instructions including a video, background on the Physics and instructions on running the experiment, as well as a link to an on-line version (no need to install unless you want to).

The Virtual Physics Laboratory of which this practical is a part, has the Association for Science Education’s Green Tick of approval.

Andrew McPhee Wellington School:

I thought that the controls were pretty easy to get used to and the detail in the apparatus was excellent being able to zoom in and see the set up of the multi-meter and read scales, being careful of parallax. This type of software is most useful in experiments which can’t be done in the lab like the gravity on the moon or where the equipment is too expensive or difficult to use like the Millikan Oil drop.

Physics Scholar Coordinator.

Licence
This product is for a single user and is for personal and classroom. Purchasing and downloading this product is your consent to these conditions.