# Atal Tinkering Labs ATL

## MRI Basics : Part 4 : Relaxation

In part 4 of my 5 part series I discuss how an image is formed from the result of relaxation. I also discuss T1 and T2 weighting and how that proves the image.

## MRI basics: part 5 : Determine Location

In my final part of a 5 part series on MRI, I discuss how the MRI machine uses gradient coils to determine the location of precessing hydrogen atoms. I also do a brief review of all 5 parts

## MRI basics: part 3 : Resonance

In part 3 of my MRI series, I discuss how an radio frequency alters the aligned precessing nuclei through the process of resonance Both are explained at length in a non technical fashion

## BCS Theory simplified

Want to understand how superconductors but don’t have a quantum mechanics degree? Here is a simplified explanation of the BCS theory to help you, sing a clear explanation with animations.

## michelson morley experiment explained

In this video I review the famous Michelson Morley experiment, what is known as the most famous null result experiment. Although impossible to reconcile with the understating of Physics at the time, it became fully understood in the context of Einstein’s Theory of Special Relativity. I use a couple of useful analogies to help you understand the experiment.

## Meissner Effect demonstrated (basic)

A video that demonstrates the Meissner Effect. Produced with the Australian HSC in mind. This does abruptly end as I had to remove an erroneous section. Nonetheless, it’s the meissner effect that causes levitation. Any further explanation for the stability of the levitation is Quantum related and beyond the school of a high school student.

## MRI basics: part 1: Nuclear spin

In the first of a series on MRI, I discuss nuclear spin and how it lead to net spin.I avoid discussion of quantum mechanics where possible to help the high school student understand spin.

## X-rays Explained

A lesson on X-rays, and how they are produced. Covered at the depth required for high school Physics.   For students of NSW, this cover the dot points in the Medical Physics elective (9.6) •describe how X-rays are currently produced • compare the differences between ‘soft’ and ‘hard’ X Rays

## Understanding PET scans

In this video, I discuss Positron Emission Tomography. In particular, I refer to the source of the positron, its annihilation and how the resultant gamma rays are collected. I also briefly discuss its diagnostic benefits.

## Simultaneity Explained

In this video, I explain simultaneity using a question from the 2011 HSC physics paper

## Band theory (semiconductors) explained

An explanation of band theory, discussing the difference between conductors, semiconductors and insulators, including a useful analogy.

## intrinsic semiconductors Explained

An explanation of intrinsic semiconductors work, in light of Band Theory.

## Extrinsic Semiconductors Explained

The third in the series on semiconductors, this video explains how doping a semiconductor such as silicon, improves its conductive properties, using band theory model to explain. This video aligns with the NSW HSC syllabus but is applicable to other jurisdictions.

## Doppler Effect Explained

A quick explanation of the doppler effect using an animation written by W. Christian at Davidson College. This useful animation to undertaking pitch change in moving sound sources and also how ultrasound (sonograms) can measure blood flow.

## RUDE – a way to solve physics numerical problems

In this video I teach you to use the acronym of RUDE to help you solve physics calculation problems and a logical and sequential way

## top ten tips for exam success

Here are my top ten tips in doing exams. Although the focus is Physics, and science in general, you can apply them in any subject.

## NSW Physics review – dot points 9.4.4

The in a series of short videos, I review the dot points in the NSW HSC syllabus. I won’t go into the full details of the physics of each point, but I will touch on them discussing the nuances of each dot point. I this set I review section 9.4 Ideas to Implementation part 4 – on superconductors

## NSW Physics review – dot points 9.4.3

The in a series of short videos, I review the dot points in the NSW HSC syllabus. I won’t go into the full details of the physics of each point, but I will touch on them discussing the nuances of each dot point. I this set I review section 9.4 Ideas to Implementation part 3 – on semiconductors

## HSC physics dot point review 9.4.2

This video reviews the dot points in Ideas to Implementation section of the Physics syllabus, looking at the Photoelectric Effect and Einstein’s contribution to it

## 9.4.1 – review of Ideas to Implementation

This is a summary of the dot points for Ideas to Implementation, part 1, covering charges in fields, cathode rays, JJ Thompson.

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