Find the Frequency of an AM Radio Station with a 75m Tower and Ground Reflection

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To find the frequency of an AM radio station with a 75m tower, which is equivalent to λ/4, the total wavelength is determined to be 150m. Using the relationship v = fλ, where v is the velocity of radio waves (approximately 3 x 10^8 m/s), the frequency can be calculated. The correct frequency is found to be 1 MHz, as λ is twice the height of the tower. The discussion emphasizes the importance of using the correct formulas and understanding the relationship between wavelength and frequency. The solution confirms that the velocity of radio waves is essential for accurate frequency calculation.
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URGENT! Frequency question

Homework Statement


A radio antenna for an AM station is 75m high tower that is equivalent to lamda/4; another lamda/4 corresponds to ground reflection. At what frequency does the station transmit?


Homework Equations


v=f(lamda)
E=cB

The Attempt at a Solution



Actually, I am not sure what equation to use!?

Please help..I think it's a simple question if i know the equation
 
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What is the velocity of radio waves?
Use the relevant equation to find f.
 


THe answer is 1M Hz..v=f lamda
is not the right equation to use?
 


The formula is correct. In the problem wavelength λ = 2*150m. What is the velocity of radio waves?
 

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