A B C D E F G H I J K L M N O P Q R S T U V W X Y Z


Magnetic field:
The region around a magnet where its magnetic force is experienced by other magnetic objects.
 
Magnetic reversal:
The changing of polarity of the earth's magnetic field as the north magnetic pole and the south magnetic pole exchange positions.
 
Magnetic wave:
The spread of magnetization from a small portion of a substance where an abrupt change in the magnetic field has taken place.
 
Magnification:
The ratio of the size of the image to the size of the object.
 
Malus law:
The intensity of the light transmitted from the analyzer varies directly as the square of the cosine of the angle between the plane of transmission of analyzer and polarizer.
 
Maser:
Microwave amplification by stimulated emission of radiation.
 
Mass defect:
The difference between the sum of the masses of the individual nucleons forming a nucleus and the actual mass of that nucleus.
 
Mass number:
The sum of the number of protons and neutrons in a nucleus.
 
Mean life:
"The average time during which a system
 
Mechanical energy:
"The sum of energy possessed by a body due to its position
 
Mechanical wave:
"The waves
 
Megahertz:
"Unit of frequency
 
MeV:
"Unit of energy
 
Millibar:
A measure of atmospheric pressure equivalent to 1000 dynes per cm 2.
 
Modulus of elasticity:
The ratio of stress to the strain produced in a body.
 
Modulus of rigidity:
The ratio of tangential stress to the shear strain produced in a body.
 
Mole:
"The amount of a substance that contains Avogadro's number of atoms
 
Momentum:
"The product of mass and velocity of a body
 
Monochromatic light:
Consisting of single wavelength.