/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q. 13 Microwaves pass through a small ... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 17: Q. 13 (page 483)

Microwaves pass through a small hole into the 鈥渕icrowave cavity鈥� of FIGURE EX17.13. What frequencies between 10 GHz and 20 GHz will create standing waves in the cavity?

Short Answer

Expert verified
m
fmGHz
710.5
812.0
913.5
1015.0
1116.5
1218.0
1319.5

Step by step solution

01

Given information

The length of the microwave cavity is L=10cm=0.10m

02

Frequencies of the standing waves

There are reflectors at both ends, so the electromagnetic standing wave acts like the standing wave on a string that is tied at both ends.

The electromagnetic waves of all frequencies travel at the speed of light c.

The frequencies of the standing waves are given by

fm=mvlight2L=mc2L

Substitute the given values

fm=m3脳1082脳0.10=m1.5脳109=1.5mGHz

03

Frequencies between 10 GHz and 20 GHz

The generator can produce standing waves at any frequency between 10GHzand 20GHz.

The table below shows the frequencies produce by the generator between 10GHzand 20GHz.

m
fmGHz
710.5
812
913.5
1015
1116.5
1218
1319.5

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Two loudspeakers in a 20oCroom emit 686 Hz sound waves

along the x-axis.

a. If the speakers are in phase, what is the smallest distance between the speakers for which the interference of the sound

waves is maximum destructive?

b. If the speakers are out of phase, what is the smallest distance

between the speakers for which the interference of the sound

waves is maximum constructive?

A 280 Hz sound wave is

directed into one end of the

trombone slide seen in FIGURE

CP17.77. A microphone

is placed at the other end to

record the intensity of sound

waves that are transmitted

through the tube. The straight

sides of the slide are 80 cm in length and 10 cm apart with a

semicircular bend at the end. For what slide extensions s will the

microphone detect a maximum of sound intensity?

The fundamental frequency of an open-open tube is 1500 Hz when the tube is filled with 0掳C helium. What is its frequency when filled with 0掳C air?

Noise-canceling headphones are an application of destructive

interference. Each side of the headphones uses a microphone to

pick up noise, delays it slightly, then rebroadcasts the noise next

to your ear where it can interfere with the incoming sound wave

of the noise. Suppose you are sitting 1.8 m from an annoying,

110 Hz buzzing sound. What is the minimum headphone delay, in

ms, that will cancel this noise?

A flutist assembles her flute in a room where the speed of

sound is 342 m/s. When she plays the note A, it is in perfect tune

with a 440 Hz tuning fork. After a few minutes, the air inside her

flute has warmed to where the speed of sound is 346 m/s.

a. How many beats per second will she hear if she now plays the

note A as the tuning fork is sounded?
See all solutions

Recommended explanations on Physics Textbooks

Fluids

Read Explanation

Wave Optics

Read Explanation

Dynamics

Read Explanation

Space Physics

Read Explanation

Thermodynamics

Read Explanation

Oscillations

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.