APhO Problems and Solutions

Files collected from APhO Website

2021

Taiwan

Water-Hammer Effect

Problem Solution

Ray tracing

Problem Solution

Magnetic Levitation

Problem Solution

2019

Australia

RF Reflectometry of Single-Electron Circuits

Problem Solution

Jets from AGN

Problem Solution

Tippe top

Problem Solution

2018

Vietnam

Optical Trap of Neutral Atoms

Problem Solution

Space Elevator

Problem Solution

Thermoelectric Effects

Problem Solution

2017

Russia

Vortices in superfluid

Problem Solution

Evolution of Supermassive Black Holes Binary

Problem Solution

Space Debris

Problem Solution

2016

Hong Kong

Mechanics of a Deformable Lattice

Problem Solution

The Expanding Universe

Problem Solution

Magnetic Field Effects on Superconductors

Problem Solution

2015

China

Fractional Quantum Hall effect (FQHE)

Problem Solution

How are Aurora Ignited by the Solar Wind?

Problem Solution

Fabry-Perot (F-P) etalon

Problem Solution

2014

Singapore

Hadley Circulation

Problem Solution

Two-Slit Electron Interference

Problem Solution

Gravitational Lensing

Problem Solution

2013

Indonesia

Conductors in Conducting Liquid

Problem Solution

Relativistic Correction on GPS Satellite

Problem Solution

Physics of Spin

Problem Solution

2012

India

The Drag on a Falling Magnet

Problem Solution

Chandrasekhar Limit

Problem Solution

Pancharatnam Phase

Problem Solution

2011

Israel

The Shockley-James Paradox

Problem Solution

Creaking Door

Problem Solution

Birthday Balloon

Problem Solution

2010

Taiwan

Particles and Waves

Problem Solution

Strong Resistive Electromagnets

Problem Solution

Electron and Gas Bubbles in Liquids

Problem Solution

2009

Thailand

Rolling Cylinders

Problem Solution

A Self-excited Magnetic Dynamo

Problem Solution

The Leidenfrost Phenomenon

Problem Solution

2008

Mongolia

Tea Ceremony and Physics of Bubbles

Problem Solution

Ionic Crystal, Yukawa-type Potential and Pauli Principle

Problem Solution

How does a superluminal object look like?

Problem Solution

2007

China

Back-and-Forth Rolling of a Liquid-Filled Sphere

Problem Solution

Optical properties of an unusual material

Problem Solution

Specific heat of free electron gas at constant volume

Problem Solution

2006

Kazakhstan

Laser cooling of atoms

Problem Solution

Oscillator damped by sliding friction

Problem Solution

Three Problems

Problem Solution

2005

Indonesia

Spring Cylinder With Massive Piston

Problem Solution

Magnetic Focusing

Problem Solution

Light Deflection by a Moving Mirror

Problem Solution

2004

Vietnam

Measure the mass in the weightless state

Problem Solution

Optical fiber

Problem Solution

Compression and expansion of a two gases system

Problem Solution

2003

Thailand

Satellite's orbit transfer

Problem Solution

Optical Gyroscope

Problem Solution

Plasma Lens

Problem Solution

2002

Singapore

Vibrations of a Linear Crystal Lattice

Problem Solution

The Rail Gun

Problem Solution

Water Fabrication

Problem Solution

2001

Taiwan

When will the Moon become a Synchronous Satellite?

Problem Solution

Motion of an Electric Dipole in a Magnetic Field

Problem Solution

Thermal Vibrations of Surface Atoms

Problem Solution

2000

Indonesia

Eclipses of the Jupiter's Satellite

Problem Solution

Detection of Alpha Particles

Problem Solution

Stewart-Tolman Effect

Problem Solution