2. λ
Wavelength (λ) is the least distance
between any two points in phase

3. Q. A mains transformer vibrates the floor at 50Hz.
360 o = Π radians
Q. A mains transformer vibrates the floor at 50Hz.
What is the time for a complete cycle?

4. Wave speed equation
speed = distance
time

5. Wave speed equation

6. λ B A d λ Wavelength (λ) is the least distance
between any two points in phase B A
Phase difference between particles
at A and B = Π d radians λ d
Phase difference is the fraction of a cycle
between two particles measured in radians or degrees.

7. λ B A d λ Wavelength (λ) is the least distance
between any two points in phase B A
Phase difference between particles
at A and B = Π d radians λ d
360 o = Π radians
Phase difference is the fraction of a cycle
between two particles measured in radians or degrees.

8. Particle movement in a progressive wave

9. Particle movement in a progressive wave
T + T/4
or + Π / 2

10. Particle movement in a progressive wave
T + T/4
or + Π / 2
T + T/2
or + Π

11. Particle movement in a progressive wave
T + T/4
or + Π / 2
T + T/2
or + Π
T + 3T/4
or + 3Π / 2

12. Particle movement in a progressive wave
T + T/4
or + Π / 2
T + T/2
or + Π
T + 3T/4
or + 3Π / 2 2T
or + 2Π

14. Particle movement in a progressive wave

15. B A
360 o = Π radians

16. λ B A d λ Wavelength (λ) is the least distance
between any two points in phase B A
Phase difference between particles
at A and B = Π d radians λ d
360 o = Π radians
Phase difference is the fraction of a cycle
between two particles measured in radians or degrees.