Science Quiz 1 4th Quarter

William Gillbert

Systematically studied magnetism

Electricus

Materials that attract small objects

Hans Christian Orsted

First demonstrated that electric currents create magnetic fields

Michael Faraday

Discovered electromagnetic induction

Induced current

Current produced by magnetic field

Joseph Henry

Discovered the phenomenon of electromagnetic induction

James Clerk Maxwell

-Discovered scientific theory

-Formulated the famous Maxwell’s equation

-Describe how electric and magnetic fields interact

Speed of light

Electromagnetic waves travel at the _____

Heinrich Hertz

-He applied Maxwell’s theory to the production and reception of radio waves

-Proved the existence of radio waves

Transverse waves

Oscillation of the electric and magnetic fields are perpendicular to the direction of wave propagation

Crest

Highest point of a wave

Trough

Lowest point of a wave

Amplitude

Maximum displacement; measures how far the particles move

Wavelength

Distance between 2 consecutive crests or measured in meters

Frequency

Refers to how manyy complete wave cycles pass a given point per unit of time

Node

Point where there is no movement or change

Electromagnetic spectrum

Entire range of electromagnetic radiation

Electromagnetic radiation

Energy that is emitted or radiated by charged particles in the form of EM waves

Electromagnetic waves

Wave that propagate through space

Radio waves

Longest wave and low frequencies

Non-ionizing

Not enough energy to ionize atoms or molecules

Microwaves

Shorter wavelengths and higher frequencies

Infrared

Longer wavelengths than visible light but shorter than microwaves

Visible light

Small portion of the electromagnetic spectrum

Ultraviolet

Shorter wavelength and higher frequencies than visible light

X-rays

High energy and shorter wavelengths than Ultraviolet radiation

Ionizing radiation

Enough energy to remove electrons from atoms and molecules

Gamma Rays

Highest energy, very high frequency and shortest wavelength