EM Spectrum

• Wave - is a disturbance that travels from the source to another place through a medium
• Medium - is the surface or is referred to the object or the substance through which waves travel
• Mechanical waves - requires a medium to travel, the mediums can be solid, liquid, or gas, energy is transferred through a vibration of particles of the medium, i. e sound waves, water waves, spring
• Electromagnetic waves - do not need a medium to travel, energy is transferred through vibrations of electric or magnetic fields, i.e radio waves, microwaves, infrared rays, light, ultraviolet light, x-rays, gamma rays
• Transverse wave - perpendicular to the direction of the wave, particles of the medium moves in a up and down motion, i.e. light, other Electromagnetic waves, surface water wave, string wave
• Longitudal waves - particles of the medium move in a direction back and forth parallel to the direction of the wave, i.e. sound waves
• crest - the highest point of the wave
• trough - the lowest point of the wave
• amplitude - the height of the wave which also describes the amount of energy the wave carries
• principal axis - the equilibrium or undisturbed position of the particles of the medium
• wavelength - distance between waves
• Wavelength - the distance between two consecutive crest or troughs of a wave
• Frequency - the number of waves that pass through a certain point in a certain time
• Period - the time took for the wave to pass through a certain point
• Wave velocity - the distance travelled by a wave per unit of time
• Reflection - occurs when there is bouncing off a barrier
• Refraction - the change in direction of waves that occurs when waves travel from a medium to another
• Diffraction - the bending of waves around obstacles and openings
• Interference - a phenomenon which to waves superpose to form a resultant wave of greater, lower, or the same amplitude
• The order of Electromagnetic waves in descending wavelength but ascending frequency : Radio waves, Mircrowave, Infrared, Visible light, Ultraviolet light, X-ray, Gamma rays