Introduction
Introduction video
Topic: Doppler effect
The below video is the introduction of the lesson which mainly focus on the lesson outcomes and what is to be discussed in class.
Task
Practice Task
Topic: Doppler Effect
Questions
1. An ambulance is moving towards a stationary listener at a constant speed of 30 m/s. The siren of the ambulance emits sound waves having a wavelength of 0.28 m. TAKE THE SPEED OF SOUND IN AIR AS 340 m/s.
1.1.1 Define Doppler Effect in words. (2)
1.1.2 Calculate the frequency of the sound waves emitted by the siren as heard by the ambulance driver. (3)
1.1.3 Calculate the frequency of the sound waves emitted by the siren as heard by the listener. (5)
1.1.4 Explain how this Effect can help a blind person waiting to cross the road. (2)
1.1.5 State one use of Doppler Effect in medicine
Process
What is Doppler Effect? Definition, Formula, Doppler Effect Example and Applications https://byjus.com/jee/doppler-effect/
•The above links may be used to help you to attempt your given task, They explain how Doppler occur and help you gain more understanding about this phenomenon.
•You need to take note on the Formula of Doppler effect especially signs when the source of sound is moving towards and away.
•All steps must be shown in calculations
Evaluation
• Define all questions in full as taught in the classroom.
• Copy Formula as it is. As it will account for 1 mark
• Correct substation
•Correct answer with the correct units
• Explain fully when asked to
All the above will be checked in order for you to have a mark
Conclusion
The leaners will have to take note of the addition and subtraction sign on which one to use during different motions of the Source of sound.
The leaners must be able to analyze a given statement in order to make sense on what is happening.