Michelson Interferometer
Michelson interferometer The Michelson interferometer was invented by the American physicist Michelson. Although it has a simple structure, it can...
Measurement
Twin Paradox
Twin Paradox Twin paradox started as a contradiction in ‘time delay’ in Special relativity. The Twin Paradox goes something like...
Minkowski Spacetime
Minkowski Spacetime Minkowski spacetime (or Minkowski space) is a coordinate system devised by German mathematician Minkowski. The peculiar thing is...
Special Relativity: Length Contraction
CAUTION: Read the following instructions to the end to get the result that the moving object appears to be constricted...
Special Relativity: Time dilation
The meanings of the symbols used in this simulation are as follows. L = Distance that light travels in a...
Eratosthenes’ Calculation of Earth’s Circumference 2
Eratosthenes’ Calculation of Earth’s Circumference The first person to measure the earth’s size was Eratosthenes, an ancient Greek scientist about...
How to use a multimeter
Multimeter A multimeter is a measuring device that combines various measurement functions such as voltage, current, and resistance. Multimeters are...
Structure of an ammeter
Ammeter The strength of the current in the electrical circuit is measured using an ammeter. There is a rotor with...
Gulliver’s Nutrition
Why did the King of Lilliput serve 1728 meals to Gulliver? This is because the volume of two objects that...
Spring Scales
A spring scale is a tool that measures the mass and gravity of an object using the spring’s elastic force....
Eratosthenes’ Calculation of Earth’s Circumference
Eratosthenes’ Calculation of Earth’s Circumference The first person to measure the earth’s size was Eratosthenes, an ancient Greek scientist about...
Archimedes Buoyancy 2
Why is the submerged volume important to understand buoyancy? It is so famous that the 3rd-century Greek philosopher Archimedes shouted...
