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Wave, EM Wave and Sound Question1. A sound wave of frequency 60 Hz is emitted downwards from a ship. The sound wave is reflected from the seabed and is detected as it arrives back at the ship. (a) Analysis: 2. RADAR, short for RAdio Detection And Ranging has many applications. It is a system used to detect and determine the distance of objects such as aircraft. Strong radio waves are transmitted and a receiver listens for any echoes. The figure below shows a radar station that has detected an in coming aircraft. (a) Electromagnetic waves 3. The diagram below shows the waveform produced on an oscilloscope screen by the sound of a band instrument. (a)(i) The amplitude of the waveform increases, thus loudness increases. |
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