Index R...

radiation exposure	Biological Effects of Ionizing Radiation
radio antenna	Wavelength of radio waves
radio receiver	Q of a radio receiver
radioactive contamination	Radioactive contamination at Chernobyl
radioactive decay	The hot potato
	Probability distribution for radioactive decay
radioactivity	Radioactivity
	Summary - Radioactivity
rain	Rain falling into a moving cart
rainbow	Color and refraction
randomness	Summary - Randomness
rappelling	Rappelling
ray model	Summary - Ray Model of Light
recoil	A Cannon
recoiling	Absorbing an impact without recoiling?
reductionism	The Atom
reflection	Reflection and Transmission
	Quantitative Treatment of Reflection
	Summary - Bounded Waves
	Interaction of Light with Matter
	The Principle of Least Time for Reflection
	Summary - Ray Model of Light
	Summary - Refraction
	Reflection and Transmission
refraction	Refraction and the Principle of Least Time
	Summary - Refraction
	Refraction and the Eye
	Refractive properties of media
	Snell's law
	Index of Refraction
	Color and refraction
	Discussion - Refraction and Images
refrigerator	Using a refrigerator to decrease entropy?
relative motion	Energy and Relative Motion
relativity	Relativity
	The Principle of Relativity
	Summary - Relativity
release history	Download and Release History
repeating phenomena	Vibrations
repulsive gravity	Evidence for Repulsive Gravity
resistance	Resistance
resistor	Applications of Resistors
	Resistors
resitance	Resistance of a lightbulb
resonance	Q of a stereo speaker
	The Collapse of the Tacoma Narrows Bridge
	Putting Energy Into Vibrations
	Water in a U-tube
	Exercise: Worksheet on Resonance
rifle	Momentum and kinetic energy in firing a rifle
Roemer	The Nature of Light
rotation	Introduction to Angular Momentum
	Types of Motion
rounding	Significant Figures
Rutherford	The Planetary Model of the Atom