Antimatter
Antimatter is a substance made up of subatomic particles that have the same mass as ordinary matter, but with opposite electric charge and parity. For example, an electron has a negative charge, while the positron, has a positive charge. More ...
Absorption and Emission Spectra
Absorption are produced when atoms absorb energy and create dark lines or gaps in the spectrum. Absorption spectra can range from narrow lines to broad bands. Emission spectra are emitted by an atom or compound when electrons transition from a higher energy state to a lower energy state. More ...
Projectile Motion
information about STEM Physics More ...
Bohr's Explanation of the Hydrogen Spectrum
In 1915, Danish physicist Niels Bohr proposed that electrons orbit the nucleus of an atom at fixed energy levels, and that orbits further from the nucleus have higher energy levels. Electrons emit energy in the form of light when they return to a lower energy level. More ...
Multiplying Vectors
information about STEM Physics More ...
Adding Vectors - Components of Vectors
information about STEM Physics More ...
Magnetic Fields
A magnet creates a magnetic field around it that describes the force exerted on other magnets placed in the field. As with electric fields, the pictorial representation of magnetic field lines is very useful for visualizing the strength and direction of the magnetic field. More ...
Average Acceleration and Instantaneous Acceleration
information about STEM Physics More ...
Quarks
Quarks and gluons are the building blocks of protons and neutrons, which in turn are the building blocks of atomic nuclei. They are the elementary particles in the present standard model. More ...
Adding Vectors - Components of Vectors
information about STEM Physics More ...
