Physics 2 cram

Niels Bohr

Bohr model of the atom, quantized elctron orbits

Heinrich Hertz

proved existence of electromagnetic waves, generating and detecting radio waves. HZ named after him

Niels Bohr

Bohr model of the atom, quantized elctron orbits

Heinrich Hertz

proved existence of electromagnetic waves, generating and detecting radio waves. HZ named after him

Marie Curie

discovered the elements polonium and radium; first woman to win a Nobel Prize and the only person to win in two different sciences (Physics and Chemistry).

Gustav Kirchoff

Kirchhoff's circuit laws ; to spectroscopy and the understanding of blackbody radiation.

Louis de Broglie

wave-particle duality of electrons and all matter

Heinrich Lenz

Lenz's Law, stating that an induced current will flow in a direction that opposes the change that produced it; conservation of energy in electromagnetic induction

Christian Doppler

Doppler Effect, which describes the change in frequency or wavelength of a wave in relation to an observer moving relative to the source.

Albert Einstein

Relativity, brownian motion, photoelectric effect, photons, E=mc^2

George Ohm

Ohm’s Law, which relates voltage, current, and resistance in an electrical circuit (V = IR).

Isaac Newton

Laws of motion and gravitation

Michael Faraday

Electromagnetic induction

Ernest Rutherford

Rutherford model of atom; pos charge is at the middle

Galileo Galilei

Heliocentrism, improved telescope

J.J. Thompson

Plum pudding model of atom, discovery of electron

How do Electromagnetic (EM) waves travel through a vacuum?

Do not need a medium to travel, due to mutual changes between magnetic and electric fields

What conditions are needed for sound to travel?

a medium: air, water, or solids, for vibrations to propagate

How do electrons (e^-) and protons (p⁺) behave when moving through a Magnetic (B) field?

They travel in a circular/helical path, due to the magnetic field’s force on the electron/proton

Through an Electric (E) field?

Based on the charge of the particle, it will either be deflected or attracted to a plate, with protons deflected to the negative and electrons deflected towards the positive

How do they respond when placed in a Magnetic (B) field? An Electric (E) field

Same as moving through a magnetic/electric field

Relationship between mass and energy according to Einstein.

e = mc²

Refraction of light: When looking at an object that is placed in water, what is the actual position of the object?

It is deeper than it appears, because the refraction will make it appear closer. The light rays bend as they go from the water to your eyes, placing the object in a different location than it actually is