Macrocosm - Also called a Linac, a scientific
machine in which particles are accelerated in groups along a
straight line path.
Magnetic Field - A field of force that is
generated by electric currents. The Sun's average large-scale
magnetic field, like that of the Earth, exhibits a north and a
south pole linked by lines of magnetic force.
Magnetic Field Lines - Imaginary lines that indicate the
strength and direction of a magnetic field. The orientation of
the line and an arrow show the direction of the field. The lines
are drawn closer together where the field is stronger. Charged
particles move freely along magnetic field lines, but are
inhibited by the magnetic force from moving across field lines.
Megaton - An explosive force equal to one
million metric tons of TNT. The energy released in the explosion
of one megaton of TNT is equal to 4.2 x 1022 ergs.
MeV - One million electron volts.
Microcosm - A large system.
Machine - Device that changes force needed
to do work.
Magnification - Ratio of size of an optical image
to the size of the object.
Manipulated Variable - Variable that the experimenter
Mass Defect - Mass equivalent of the binding
energy; m=E/c^ 2
Number - Number of nucleons ( protons plus
neutrons) in the nucleus of an atom.
Mass Spectrometer - Device used to measure the mass
of atoms or molecules.
Matter Wave - Wave-like properties of particles
such as electrons.
Mechanical Advantage - Ratio of resistance force to
effort force in a machine.
Mechanical Energy - Sum of potential and kinetic
Resonance - Condition at which natural
oscillation frequency equals frequency of driving force;
amplitude of oscillatory motion at a maximum.
Mechanical Wave - Wave consisting of periodic
motion of matter; e.g. sound wave or water wave as opposed to
Melting Point - Temperature at which substance
changes from solid to liquid state.
Meson - Medium mass subatomic particle
consisting of combination of a quark and antiquark.
Meter - SI unit of length.
Mirror Equation - 1/do +1/di=1/f, where do is
object distance, di is image distance, f is focal length.
Moderator - Material used to decrease speed
of neutrons in nuclear reactor.
Momentum - Product of object’s mass and
Light - Light of a single wavelength.
Mutual Inductance - Measures the amount of overlap
between the magnetic flux produced in one coil and that which
passes through a second coil, thus the amount of EMP induced in
a secondary coil by the varying flux in the primary coil.
Myopia - Defect of eye, commonly called nearsightedness, in which distant
objects focus in front of the retina.