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An electromagnetic wave of frequency f = 7.3MHz passes from a vacuum into a dielectric medium with permittivityε = 9. Then,
  • a)
    Frequency of the wave will remains same but wavelength will become thrice
  • b)
    Frequency remains same but the Velocity and wavelength both will become 3 times of the original value
  • c)
    Velocity and frequency both will become 1/3 times of the original value
  • d)
    Frequency remains same but the Velocity and wavelength both will become 1/3 times of the original value
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
An electromagnetic wave of frequency f = 7.3MHz passes from a vacuum i...
As permittivity is greater than the permittivity of free space so the refractive index of medium is

Wavelength of the electromagnetic wave in medium will be 
Velocity of wave will be. 
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Most Upvoted Answer
An electromagnetic wave of frequency f = 7.3MHz passes from a vacuum i...
To determine the speed of an electromagnetic wave in a dielectric medium, we need to use the formula:

v = c/n

Where:
v = speed of light in the dielectric medium
c = speed of light in a vacuum (3.00 x 10^8 m/s)
n = refractive index of the dielectric medium

The refractive index (n) of a dielectric medium can be related to the permittivity (ε) of the medium using the formula:

n = √(ε)

Given that the frequency of the electromagnetic wave is f = 7.3 MHz (where 1 MHz = 10^6 Hz), we can calculate the wavelength (λ) of the wave using the formula:

λ = c/f

Let's calculate the speed of light in the dielectric medium:

v = c/n

First, we need to find the permittivity (ε) of the dielectric medium. If the permittivity is not given, we cannot calculate the speed of light in the dielectric medium.
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An electromagnetic wave of frequency f = 7.3MHz passes from a vacuum into a dielectric medium with permittivityε = 9. Then,a)Frequency of the wave will remains same but wavelength will become thriceb)Frequency remains same but the Velocity and wavelength both will become 3 times of the original valuec)Velocity and frequency both will become 1/3times of the original valued)Frequency remains same but the Velocity and wavelength both will become 1/3 times of the original valueCorrect answer is option 'D'. Can you explain this answer?
Question Description
An electromagnetic wave of frequency f = 7.3MHz passes from a vacuum into a dielectric medium with permittivityε = 9. Then,a)Frequency of the wave will remains same but wavelength will become thriceb)Frequency remains same but the Velocity and wavelength both will become 3 times of the original valuec)Velocity and frequency both will become 1/3times of the original valued)Frequency remains same but the Velocity and wavelength both will become 1/3 times of the original valueCorrect answer is option 'D'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about An electromagnetic wave of frequency f = 7.3MHz passes from a vacuum into a dielectric medium with permittivityε = 9. Then,a)Frequency of the wave will remains same but wavelength will become thriceb)Frequency remains same but the Velocity and wavelength both will become 3 times of the original valuec)Velocity and frequency both will become 1/3times of the original valued)Frequency remains same but the Velocity and wavelength both will become 1/3 times of the original valueCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An electromagnetic wave of frequency f = 7.3MHz passes from a vacuum into a dielectric medium with permittivityε = 9. Then,a)Frequency of the wave will remains same but wavelength will become thriceb)Frequency remains same but the Velocity and wavelength both will become 3 times of the original valuec)Velocity and frequency both will become 1/3times of the original valued)Frequency remains same but the Velocity and wavelength both will become 1/3 times of the original valueCorrect answer is option 'D'. Can you explain this answer?.
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