Development of Atomic Theory
This Greek philosopher was the first to propose that matter was not infinitely divisible
Who is Democritus?
Visible light is one type of this, or energy that exhibits wavelike behavior as it travels through space.
What is electromagnetic radiation?
These are three characteristics of waves that we discussed in class
What are wavelength, frequency, and amplitude?
What is the crest?
This term, which means "not divisible," was coined by Democritus, and would later become the term with which we describe individual particles of matter
What are atomos?
Democritus was surprisingly ahead of his time, but this more famous contemporary of his rejected his ideas about atoms, which stalled the progression of our understanding by almost 2000 years.
Who is Aristotle?
This tool can be used to separate light into a continuous spectrum of color
What is a prism?
This is the shortest distance between two equivalent points on a wave, and is often measured in nanometers (nm)
What is wavelength?
This is the distance represented by the letter "B"
What is the wavelength?
The speed that all forms of electromagnetic radiation travel at
What is the speed of light?
This English school teacher revived and revised Democritus' ideas about the atoms in his 1803 book on atomic theory
Who is John Dalton?
This thin sliver of the electromagnetic spectrum contains all of the colors that the human eye can perceive.
What is the visible spectrum?
This is the unit used to represent a wave's frequency, or the number of times it passes a given point per second.
What is Hertz?
What is the amplitude?
As the wavelength increases, frequency decreases, a relationship known as...
What is an inverse relationship?
This scientist confirmed the existence of electrons, and determined their charge-to-mass ratio, but is most remembered for his (ultimately disproven) plum pudding model of the atom
Who is J.J. Thomson?
This type of light contains all of the colors of the visible spectrum, and is produced by the sun in nature
What is white light?
This characteristic of waves represents its intensity, and can be measured from origin to crest or from origin to trough
What is amplitude?
What is the trough?
These are formed when tiny drops of water in the air disperse light from the sun into its component colors
What is a rainbow?
This scientist discovered that most of the mass of an atom was contained in a tiny, dense region in the center
Who is Ernest Rutherford?
The numerical value for the speed of light.
What is 3 x 108 m/s?
Wavelength and frequency are related by this equation.
What is c = (wavelength) x (frequency)
This is the dotted line that crosses through the center of the wave
What is the origin?
Name four types of electromagnetic radiation
What are x-rays, microwaves, UV, IR, gamma rays, radio waves