Soft X-rays
Hard X-rays
Positive rays
Cathode rays
Circular paths
Parabolic paths
Straight lines
Curved paths
Concave mirror
Convex lens
Optical grating
Crystal
Neil Bohr
Rutherford
E. Goldstein
J.J. Thomson
Rydberg’s number
Bohr number
Wave number
Radiation number
Helium particles
Neutrons
Protons
Electrons
Aluminium
Iron
Tungsten
Copper
It penetrates through eye and brain easily
It is harmless
It cuts the tissues easily
It seals small blood vessels they cut through
Electrical
Sound
Magnetic
Electromagnetic
Spectrometer
Michelson interferometer
Bragg’s spectrometer
Bainbridge spectrometer
