What color does it look?
Three primary colors of light Red, green, and blue are called the three primary colors of light. You can create any color by adjusting the light of these three colors appropriately. red + green = yellow … more
Cell Division Model
Chromosome If you look at the onion root under a microscope, you can see cells of different shapes and sizes, such as cells with an apparent nucleus, cells that appear to be split into two cells, … more
Doppler Effect
Doppler Effect We have heard an ambulance siren and felt that the ambulance is getting closer. When the ambulance approaches, the sirens sound higher, and when they move away, the sirens sound lower. That is, when … more
Apparent Magnitude, Absolute Magnitude, and Distance to Stars
Star brightness and apparent magnitude Hipparchus of ancient Greece distinguished the stars in the night sky according to their brightness. He classified the brightest star as ‘magnitude 1’ and the darkest star as ‘magnitude 6.’ The … more
Stellar Parallax – 3D VR
Parallax When an object is close to me, you can use a ruler to measure the distance. But, it isn’t easy to measure when the object is away from me. In this case, how can you … more
Structure of Ice – 3D VR
Looking through the VR device, you can observe the 3-dimensional molecular bonding structure of ice.
Serial Parallel Circuit 2
In parallel circuit, The current splits up when it comes to a branch. The current in all the branches adds up to the current in the main part of the circuit. If one bulb breaks, the … more
Inductor application circuit
An inductor, also called a coil, choke, or reactor, is a passive two-terminal electrical component that stores electrical energy in a magnetic field when electric current flows through it. Inductors are widely used in alternating current(AC) … more
Galileo’s Pump Problem
Galileo’s Pump Problem A duke living in Tuscany, Italy, in the 17th century installed a well in the courtyard of the palace. But, the duke saw the pump fail to pull water up. The Duke asked … more
Period of Physical Pendulum
A pendulum that vibrates is one of a ‘simple pendulum’ or ‘physical pendulum.’ A simple pendulum is a case in which an object’s angular motion can be ignored, such as a small object suspended from a … more
Test Cross (to get Pure Breed)
Find out how Mendel gets a Pure Breed. Press the button to ban a specific trait.
