DescriptionDopplereffect.svg English: Waves emitted by a source moving from the right to the left. The frequency is higher on the left (ahead of the source)
DescriptionDopplereffect diagrammatic.svg English: Waves emitted by a source moving from the right to the left. The frequency is higher on the left (ahead
release it to the public Domain." English Persian منبع موج به چپ حرکت میکند، بسامد در سمت چپ بلندتر و در سمت راست کوتاهتر است. Vietnamese Doppler Effcet