1. (a) Two microwave frequencies are authorized for use in microwave ovens: f1 = 898 MHz and f2 =2566 MHz. Calculate the wavelength of each.λειτ1₤2cmcm(b) Standing waves are created in microwave ovens when the microwaves interference with theirreflections. The locations of antinodes correspond to hot-spots. Which frequency would producesmaller hot spots in foods due to interference effects? Think about why that is.a. f1= 898 MHzb. f2 = 2566 MHza. f1b. f2

Answered: Image /qna-images/answer/0141d047-cd69-4568-afb5-70ce590d8987.jpg

Answered: 1. (a) Two microwave frequencies are…

University Physics Volume 2

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ISBN:9781938168161

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Chapter16: Electromagnetic Waves

Section: Chapter Questions

Problem 76P: Radio station WWVB, operated by the National Institute of Standards and Technology (NIST) from Fort...

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Figure 24.26 shows the interference pattern of two radio antennas broadcasting the same signal. Explain how this is analogous to the interference pattern for sound produced by two speakers. Could this he used to make a directional antenna system that broadcasts preferentially in certain directions? Explain. Figure 24.26 An overhead view of two radio broadcast antennas sending the same signal, and the interference pattern they produce.
Radio station WWVB, operated by the National Institute of Standards and Technology (NIST) from Fort Collins, Colorado, at a low frequency of 60 kHz, broadcasts a time synchronization signal whose range covers the entire continental US. The timing of the synchronization signal is controlled by a set of atomic clocks to an accuracy of 101012 s, and repeats every 1 minute. The signal is used for devices, such as radio-controlled watches, that automatically synchronize with it at preset local times. WWVB's long wavelength signal tends to propagate close to the ground. (a) Calculate the wavelength of the radio waves from WWVB. (b) Estimate the error that the travel time of the signal causes in synchronizing a radio controlled watch in Norfolk, Virginia, which is 1570 mi (2527 km) from Fort Collins, Colorado.
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