Question

1. A radar pulse is sent out and reflects off an airplane. The echo of the pulse return 14.3 us after it was sent out. How far away is the airplane? (ans: 2.15 km) Show work

2. Infrared light had a lower frequency than visible light. What is the frequency of IR light that has a wavelengh of 680 nm? (ans: 4.41 x 1014 Hz) Show work

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Electromagnetic Waves

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