Tag Archives | Physics

21 CENTIMETRE LINE

Electromagnetic radiation spectral line of neutral hydrogen atoms. Fine transitions between states in which the spins of the electron and proton are parallel and antiparallel at frequency of 1420 MHz lead to creation of hydrogen spectral line.

Continue Reading · Comments { 0 }

ABAMPERE

Basic electromagnetic unit of electric current in the emu-cgs system of units. One abampere is equal to 10 amperes in SI system.

Continue Reading · Comments { 0 }

ABAXIAL

In mathematics, abaxial is direction perpendicular to an axis.

Continue Reading · Comments { 0 }

ABERRATION

Deviation from the right, normal, or usual course in optics: spherical aberration, chromatic aberration, defocus aberration.

Continue Reading · Comments { 0 }

ABNEY LAW

Desaturation of the colored light by addition of white light will shift apparent hue of spectral color toward the red end of the spectrum when the wavelength is below 570 nm or toward the blue end when wavelength is above 570 nm.

Continue Reading · Comments { 0 }

ABNEY MOUNTING

A modification of the Rowland mounting where different part of the spectrum can be seen by moving the slit.

Continue Reading · Comments { 0 }

ABSOLUTE ELECTROMETER

A very precise type of disk electrometer in which measurement of potential is made through assessment of attraction between two charged disks against gravity.

Continue Reading · Comments { 0 }

ABSOLUTE FILTER

Filter which traps 100% of particles that need to be filtered.

Continue Reading · Comments { 0 }

ABSOLUTE PRESSURE

Pressure that theoretically obtains in empty space or at the absolute zero of temperature; it is equal to gauge pressure plus atmospheric pressure.

Continue Reading · Comments { 0 }

ABSOLUTE TEMPERATURE

Temperature measured using the Kelvin scale. This scale doesn't have negative values, lowest temperature is absolute zero.

Continue Reading · Comments { 0 }