What Frequency Does a 75m High AM Radio Antenna Transmit?

  • Thread starter Thread starter SAT2400
  • Start date Start date
  • Tags Tags
    Frequency Physics
Click For Summary

Homework Help Overview

The problem involves determining the frequency of transmission for an AM radio station using a 75m high antenna, which is described as being equivalent to one-quarter of the wavelength. The context includes the relationship between wavelength, frequency, and the speed of radio waves.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants explore the relationship between the height of the antenna and the wavelength, questioning how to derive the wavelength from the given height. There are inquiries about the speed of radio waves and its role in calculating frequency.

Discussion Status

Participants are actively engaging with the problem, raising questions about the necessary values to calculate frequency and discussing the implications of the antenna height. There is no explicit consensus yet, but various interpretations of the problem are being explored.

Contextual Notes

Some participants express uncertainty about the speed of radio waves and how it relates to the calculations, indicating a need for clarification on fundamental concepts.

SAT2400
Messages
68
Reaction score
0

Homework Statement



The radio atenna for an AM station is a 75m high tower that is equivalent to lamda/4
Another lamda/4 corresponds to the ground reflection. At what frequency does the station transmit?

Homework Equations



v=f times lamda?!?


The Attempt at a Solution


THe answer was 1MHz..which is 1000Hz!?
hmm,, I don't get this..Please helP! Thanks
 
Physics news on Phys.org


If 75 m is 1/4 of lambda, what's lambda? Since v=f*lambda, what's f?
 


how do I know v?? lamda is 300...
 


SAT2400 said:
how do I know v?? lamda is 300...

What is the velocity of radio waves (EM radiation)?
 

Similar threads

Replies
3
Views
2K
  • · Replies 6 ·
Replies
6
Views
5K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 4 ·
Replies
4
Views
5K
  • · Replies 2 ·
Replies
2
Views
7K
  • · Replies 4 ·
Replies
4
Views
3K
Replies
4
Views
9K
  • · Replies 1 ·
Replies
1
Views
3K