What physical phenomenon is shown in the picture?
Euler spiral
Fraser spiral
Mach number
Doppler effect
The Doppler effect is the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source. It is named after the Austrian physicist Christian Doppler, who described the phenomenon in 1842. The Doppler effect is based on the principle of radar or ultrasound.
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Answers by country
Euler spiral
Fraser spiral
Mach number
Doppler effect
answers
the Netherlands
16
Australia
19
India
65
Poland
1671
the United States
55
Germany
35
the United Kingdom
31
Greece
12
Republic of Ireland
10