Index: R
r.m.s.
radial
radial coordinate
radial probability density
radian, rad
radiation (alpha-, beta-, gamma-)
radiation (electromagnetic)
radiation (general)
radiation (thermal)
radiation pressure
radiation weighting factor, RWF
radio waves
radioactive decay
radioactive decay equation
radioactive decay law
radioactive nucleus
radioactivity
radiocarbon dating
radioisotope
radionuclide
radius
radius of curvature
radius of gyration
radius vector
random error
random motion
range
range of integration
rarefaction
rate of change
ratio
ratio of specific heats
rational number
rationalization
rationalizing a (complex) quotient
ray
ray approximation
ray diagram
Rayleigh criterion
reactance
reaction
reaction force
reactive
reactor
real axis
real depth
real gas
real image
real line
real number
real part
rearrangement (of an equation)
reciprocal
reciprocal function
reciprocal hyperbolic functions
reciprocal rule (of differentiation)
reciprocal trigonometric functions
reciprocal trigonometric ratios
rectangle
rectangular block
rectangular hyperbola
rectilinear propagation
reduction formula
reflected ray
reflection
reflection coefficient
reflection diffraction grating
reflectivity
reflex angle
refracted ray
refraction
refractive index
regula falsi
regular polygon
relative abundance
relative atomic mass
relative maximum
relative minimum
relative molecular mass
relative permeability
relative permittivity
relative velocity
relativistic momentum
relativity
repeated root
reprocessing
resistance
resistance thermometer
resistive heating
resistivity
resistor
resolution (of a vector)
resolution
resolve
resolving power
resonance
resonance absorption bandwidth
resonance angular frequency
resonance frequency
rest energy
rest mass
rest mass energy
restoring force
resultant (vector)
resultant force
resultant moment
resultant torque
retina
reversed image
reversible
revolution
rhombus
right angle
right-angled triangle
right-hand grip rule
right-hand rule
right-hand screw rule
right-handed (Cartesian) coordinate system
rigid body
ringing time
rise
rods
root
root-mean-square (r.m.s.) current
root-mean-square (r.m.s) speed
root-mean-square value (r.m.s.)
root-mean-square (r.m.s.) voltage
roots of unity
rotation
rotational equilibrium
rotational kinetic energy
rounding
rounding-down
rounding errors
rounding-up
run
Rydberg atoms
Rydberg constant
Copyright 1997, The Open University