Refraction : freq remains unchanged

[momentum]

this is my first post in this forum.
i have a question :
i have read that when light refracts into other medium its frequency remains unchanged but velocity and wavelength changes.

there is a formula to it : v=n*lamda (v=velocity,n=freq,lambda=wavelength)

Q1: why the freq remains unchanged ?

Q2: is it true for all waves (like sound, etc ) ?


thank you

 

[dextercioby]

YES.The frequency is determined by the source.By the vibration of those electrons,or by the specific transition which occurs inside the atom.

Daniel.

 

[momentum]

i am so glad that my question has been answered so fast. i have understood your answer. this is a great forum.

i have some questions on social science, geography . will you please tell me some forum links where i could post questions on these topics. is there any forum like this which supports questions on social sc, geography,economis ?

 

[Dr.Brain]

Yes, the frequency means the cycles/sec , which as daniel said is determined by the source but the wavelength is the distance between two consecutive troughs/crests , when a light ray enters into the medium this length between crests/trough decreasses but the frequency remains the same. This happenes with all the electromagnetic waves and sound waves.

 

[momentum]

Yes, the frequency means the cycles/sec , which as daniel said is determined by the source but the wavelength is the distance between two consecutive troughs/crests , when a light ray enters into the medium this length between crests/trough decreasses but the frequency remains the same. This happenes with all the electromagnetic waves and sound waves.

thanks doctor. that's very beautiful .

 

[dextercioby]

You can ask all your questions here.In this forum for "genetal physics" and in other specialized forums for other subjects.

Welcome ot PF !


Daniel.