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.
Tag Archives | Physics
Basic electromagnetic unit of electric current in the emu-cgs system of units. One abampere is equal to 10 amperes in SI system.
In mathematics, abaxial is direction perpendicular to an axis.
Deviation from the right, normal, or usual course in optics: spherical aberration, chromatic aberration, defocus aberration.
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.
A modification of the Rowland mounting where different part of the spectrum can be seen by moving the slit.
A very precise type of disk electrometer in which measurement of potential is made through assessment of attraction between two charged disks against gravity.
Filter which traps 100% of particles that need to be filtered.
Pressure that theoretically obtains in empty space or at the absolute zero of temperature; it is equal to gauge pressure plus atmospheric pressure.
Temperature measured using the Kelvin scale. This scale doesn't have negative values, lowest temperature is absolute zero.