Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
Home  >>  JEEMAIN and AIPMT  >>  Physics  >>  Class12  >>  Electromagnetic Waves
0 votes

If an electromagnetic wave of frequency $v = 3.0\: MHz$ passes from vacuum into a dielectric medium with permittivity $e = 4.0$ then

$\begin {array} {1 1} (a)\;\text{wavelength is doubled and frequency remains unchanged}\\ (b)\;\text{wavelength is doubled and frequency becomes half} \\ (c)\;\text{wavelength is halved and frequency remains unchanged}\\ (d)\;\text{wavelength and frequency both remain unchanged} \end {array}$


Can you answer this question?

1 Answer

0 votes
Both speed and wavelength of wave will become half,  the frequency remaining unchanged
(Frequency of a wave depends on the source as due to refraction,
it is assumed that the energy is conserved, so $h\nu$ remains the same.)
Ans : (c)


answered Feb 28, 2014 by thanvigandhi_1
edited Oct 8, 2014 by thagee.vedartham

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App