1. REVISION
SOUND

2. 𝑓 𝐿 = 𝑣± 𝑣 𝐿 𝑣± 𝑣 𝑆 𝑓 𝑆 DOPPLER EFFECT
Doppler effect as the change in frequency (or pitch) of the sound detected by a listener because the sound source and the listener have different velocities relative to the medium of sound propagation
𝑓 𝐿 = 𝑣± 𝑣 𝐿 𝑣± 𝑣 𝑆 𝑓 𝑆

3. Speed of sound in medium Speed of sound in medium
FORMULA
Speed of sound in medium
Speed of listener
𝑓 𝐿 = 𝑣± 𝑣 𝐿 𝑣± 𝑣 𝑆 𝑓 𝑆
Frequency of source
Frequency of listener
Speed of source
Speed of sound in medium

5. + -
𝑓 𝐿 = 𝑣± 𝑣 𝐿 𝑣± 𝑣 𝑆 𝑓 𝑆
Apart

7. + -
𝑓 𝐿 = 𝑣± 𝑣 𝐿 𝑣± 𝑣 𝑆 𝑓 𝑆
toward each other

8. ELECTROMAGNETIC SPECTRUM
light waves It does NOT need a medium to propagate It consists of seven main groups

9. DOPPLER EFFECT with LIGHT

10. DOPPLER EFFECT with LIGHT

11. DOPPLER EFFECT with LIGHT

12. DOPPLER EFFECT with LIGHT

13. GENERAL DOPPLER EFFECT

15. CHANGES IN FREQUENCY

16. a)

17. b)