City of Science Publisher: Rolf Bertram Genre: Education Released: 29 Mar, 2017 Size: 177.1 MB Price: FREE! Click here to request a review of this app App Store Info Description Doppler Effect explained in about 2 minutes, relating to water surface waves, sound waves in air, and red shift in space. What's New in Version 3.3 Higher camera position in space port. Screenshots Screenshot 1 of 10