1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Sever21 [200]
3 years ago
7

An electromagnetic wave with frequency 65.0Hz travels in an insulating magnetic material that has dielectric constant 3.64 and r

elative permeability 5.18 at this frequency. The electric field has amplitude 7.20×10−3V/m. What is the wavelength of the wave?
Physics
1 answer:
lakkis [162]3 years ago
8 0

Answer:

  The wavelength of the wave is 1.06\times10^6 m  

Explanation:

Lets calculate

We know an electromagnetic wave is propagating through an insulating magnetic material of dielectric constant K and relative permeability K_m ,then the speed of the wave in this dielectric medium is \nu is less than the speed of the light c and is given by a relation

               \nu=\frac{c}{\sqrt{KK_m} }  --------- 1

In case the electromagnetic  wave propagating through the insulating magnetic material , the amplitudes of electric and  magnetic fields are related as -

             E_m_a_x= \nu B_m_a_x

The magnitude of the 'time averaged value' of the pointing vector is called the intensity of the wave and is given by a relation

                       I = S_a_v

                        \frac{E_m_a_xB_m_a_x}{2K_m\mu0}----------- 3

now , we will find the speed of the propagation of an electromagnetic wave by using equation 1

\nu=\frac{c}{\sqrt{KK_m} }

Putting the values ,

   =\nu= \frac{3.00\times10^8}{\sqrt{(3.64)(5.18)} }

 =0.6908\times10^8m/s

 = 6.91\times10^7m/s

Now , using this above solution , we will find the wavelength of the wave -

     \lambda=\frac{\nu}{f}

    Putting the values from above equations -

  \frac{6.91\times10^7m/s}{65.0Hz}

        \lambda= 1.06\times10^6 m

Hence , the answer is \lambda= 1.06\times10^6 m

You might be interested in
This rock, known as balance rock, sits on a thin spike of rock in a canyon in idaho. explain the forces that keep the rock balan
Evgen [1.6K]

Answer:

Action force and Reaction force

Explanation:

The action force which is the balanced rock pushing down due to gravity and the reaction force pushing the equal amount of force. These two things are stated in Newtons third law, where he states that "Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first." Also, he states that "all forces acts in pairs," meaning that every force exerted, there is an opposite force on the first.

7 0
3 years ago
Mercury, Venus, Earth, and Mars are all ______ planets.
Pepsi [2]
<span>Mercury, Venus, Earth, and Mars are all ___inner___ planets. This is because they are all within the asteroid belt.</span>
8 0
3 years ago
The force of air particles over an area is A.) temperature B.) pressure C.) Volume D.) Kelvins
Westkost [7]

Answer:The anwser is B i Promise ok

Explanation:

3 0
3 years ago
Read 2 more answers
Dallas says that any change in velocity is directly proportional tothe time interval over which the change took place. Dana says
Anna35 [415]

Answer:

e. Only(a) and (b) above are correct

Explanation:

Impulse

= Fx t = m ( v-u )

v-u = change in velocity

F x t = mass x change in velocity

change in velocity = F t / mass

=a t

change in velocity ∝ t ( time ) , if a is constant

dv = a_avg  dt

∫dv = a_avg ∫dt

v-u = a_avg t

change in velocity ∝ t ( time )

So both (a) and (b) are correct.

7 0
3 years ago
How can you give a baloon an electric charge
vodka [1.7K]

When one object is rubbed against another, static electricity can be created. This is because the rubbing creates a negative charge that is carried by electrons.

5 0
3 years ago
Other questions:
  • Can some answer 7 a and b please
    12·1 answer
  • If you see Sagittarius high in your night sky on June 20 and today is your birthday, what is your zodiac constellation?
    13·1 answer
  • PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
    6·1 answer
  • 35 POINTS! Say If You Drop A Ball from 100 Centimeters. When The ball Bounces, The Ball Does Not Bounce Back Up To 100 Centimete
    6·1 answer
  • A 3.1-kilogram gun initially at rest is free to
    11·2 answers
  • What is the ionisation energy of an atom
    15·2 answers
  • 5. Graph A plots a race car's speed for 5 seconds. The car's
    14·1 answer
  • HELP ME PLEASE!!!!
    14·1 answer
  • Which statement is best supported by the information in the chart? Wave X and Wave Y are mechanical waves, and Wave Z is an elec
    9·1 answer
  • the car turned a corner going 10m/s if it took two seconds to turn what is its acceleration is this acceleration​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!