Wave

• Wave is the disturbance that transfers energy from one place to another in a regular or organized way
• Ways of transferring energy from one place to another

  regular and organized way
• Oscillation is the regular and periodic movement of molecules
• Electromagnetic waves are transverse waves with no medium required for transmission.
• Transverse wave has oscillations perpendicular to direction of travel
• Waves transport energy not matter
• Mechanical waves are waves that transfer energy through matter or medium
• Two types of mechanical waves


  transverse wave and longitudinal wave
• Transverse waves are which the medium vibrates at right angles to the direction that the wave travels
• Longitudinal Wave in which the medium vibrates in the same direction that the wave travels
• One complete cycle is composed of a crest and a trough
• Period is the time it took to generate one complete wave
• Frequency is the number of complete waves generated in a given amount of time
• Amplitude is the height of a wave
• It is a simple disturbance

  wave pulse
• It is the continuous disturbances.

  wave train
• it has no ending or non-stop

  oscillation
• Mechanical waves only travel in matter and is incapable of traveling in vacuum
• sound is the form of energy produced by the vibrations of molecules
• sound is a longitudinal wave
• compression is a region in longitudinal waves where the particles are closest together and they are the region with high pressure
• rarefaction is a region in a longitudinal wave where the particles are further apart and they are the regions with low pressure
• the compression corresponds with the crest of the wave
• the rarefaction corresponds with the trough of the wave
• audible sound is the sound within the range of sensitivity of the human ear
• infrasound has a frequency below 20Hz
• audible sound has a frequency of 20Hz to 20,000Hz
• infrasound is too low for the human ear to hear
• ultrasound has the frequency above 20,000Hz
• ultrasound has the frequency too high for the human ear
• pitch describes the highness or lowness of a sound
• loudness refers to how loud or soft a sound seems to a listener and it is measured in decibels (dB)
• light is both a wave and a particle
• light is a type of transverse wave, and is an electromagnetic wave that does not need a medium in order to travel from one location to another
• light's constant speed is 3.0 x 10^8 m/s
• waves are released from vibrating charged particle
• characteristics of light

  color and brightness or intensity
• luminous objects emit their own light
• non-luminous objects cannot emit their own light they are also called "illuminated objects"
• candela (cd) is used to measure the intensity of the light source