Q.21

Expert-verifiedFound in: Page 451

Book edition
4th

Author(s)
Randall D. Knight

Pages
1240 pages

ISBN
9780133942651

- Telephone signals are often transmitted over long distances by microwaves. What is the frequency of microwave radiation with a wavelength of 3.0 cm?
- Microwave signals are beamed between two mountaintops 50 km apart. How long does it take a signal to travel from one mountaintop to the other?

Part (a) The frequency of microwave radiation with a wavelength of 3.0 cm is .

Part (b) It takes for the signal to travel from one mountaintop to the other

The wavelength of the microwave is

Speed of microwave signal is

The distance between two mountaintops is

The frequency is defined as the number of complete waves passing in unit time.

The formula to calculate the frequency in a periodic wave is given by

Substitute 0.03 m for and for c into the above formula to calculate the frequency.

The speed is defined as the rate of change of distance with respect to time.

The formula to calculate the time taken by the signal to travel from one mountaintop to another mountaintop is given by

Substitute for d and for c into the above formula to calculate the time.

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