Category: Physics

Cambridge Physics AS Level Multiple Choice

Cambridge AS Level Physics multiple choice questions full solutions

Cambridge Physics AS Level Multiple Choice

Published by Stanley Sim on December 25, 2019

Cambridge Assessment International Education (CAIE) Multiple Choice Questions could be easy for some, but hard for others. Many students who felt that MCQ questions are hard think so because they often select the options based on what they feel are correct. However, Physics is science, and science should be objective and not based on feelings. In this series of AS Level Physics Paper 1, the author seeks to explain the solutions of various past paper questions by using a systematic approach of PEM: Physics, Equations and Mathematics. Physics involves determining the angle of approach to solve or explain the solutions…

Determining the Original Voxel Densities

Determining the Original Voxel Densities

Published by Stanley Sim on October 20, 2019

Introduction In A-level Physics Remote Sensing, one particular concept that students were required to apply was the idea of using voxel to build up the x-ray image of a body. Some students were wondering the very arbitrary idea of performing certain procedures to arrive at the answer. In this article, I am going to explain the reason why the series of steps work as described. Procedure Assuming four voxels with unknown densities,w, x, y and z, are investigated with an x-ray beam. When an x-ray beam is directed at the region, the detected intensity could be received at the other…