science quarter 2

• transverse waves oscillates up and down
• longitudinal waves oscillate in line with wave's direction
• transverse waves act in 2 dimensions
• EM waves are created because of vibrations between and electric and magnetic field
• mechanical waves needs medium to travel through
• waves are a disturbance that travels from the place where it was created
• radio waves oscillate at frequencies between a few KHZ and a few THZ
• radio waves oscillate at frequencies between?


  few KHZ to few THZ (1012)
• microwaves are mainly used in communication
• am and fm is radio waves
• transcontinental communication is microwaves
• spacing is 10 KHZ in 117 channels is radio waves
• microwaves are used in aviation communication
• weather radar uses microwaves
• astronomy uses microwaves
• 9 khz of bandwidth means 4.25 khz is highest audio frequency encoded is radio waves
• cellphone signals uses microwaves
• nominally uses 150 khz around the corner is radio waves
• ovens are microwaves