These simulations, made accessible by the item of the menu, are:
All these selections start an animation based on initial default values of the related parameters in conventional units.
The values of these parameters can be changed by writing new values in the input fields below the graphic.
After the change, you can restart the animation by clicking on the button
You can stop or clear an animation by clicking on the button
propagation allows further specifications on the phenomenon.
See also the Doppler effect.
last revision: September 2020