Hewitt: Types of Waves

Frequency - # of vibrations in a given amount of time

1 Hz = 1 vib/s = 1 wave/s

f= 1/T or T = 1/f

FM radio waves MHz

AM radio waves KHz

velocity = frequency x wavelength

Any questions?

List two examples of transverse waves

Give one example of a longitudinal wave.

What is the average speed of sound at room temperature in air?

25.3 Interference and Standing Waves

In phase - Constructive interference

Out of phase - destructive interference

Standing wave- interference between an identical incident and reflected wave

nodes - (destructive) and antinodes (constructive)

Any questions?

25.4 Doppler Effect - apparent change in frequency due to the motion of the source or receiver.

Sound - Source moves toward you - greater the pitch

Light Red (away) Blue shift (away)

Any questions?

Bow wave - the V-shaped wave

Shock wave - overlapping spheres that form cones

sonic boom - object moves faster than sound

any questions

What is a supersonic jet?

How many cones make up a shock wave?