In which of the following will there be a DOPPLER EFFECT? Choose all that apply.
ID: 1701244 • Letter: I
Question
In which of the following will there be a DOPPLER EFFECT? Choose all that apply.A police car with its siren on is moving away from you while traveling 60 kn. You are moving towards it while traveling 60 kn.
A fire truck with its siren on is circling you. You are stationary.
An ambulance with its siren on is moving away from you while traveling 60 km/h. You are moving towards it while traveling 60 km/h.
A train with its horn blaring is moving towards you while traveling 40 m/s. You are moving away from it while traveling 60 m/s.
A marching band playing the 1812 Overture is moving away from you while traveling 40 mph. You are moving towards it while traveling 50 mph.
Explanation / Answer
The last two will be examples of the doppler effect: 1) A train with its horn blaring is moving towards you while traveling 40 m/s. You are moving away from it while traveling 60 m/s. 2) A marching band playing the 1812 Overture is moving away from you while traveling 40 mph. You are moving towards it while traveling 50 mph. The doppler effect occurs when the distance between two objects is changing. If something is moving away from you at a speed s and you are moving towrds it at a speed s, it is like you are still, there is no doppler effect.