Change in medium and its effect on sound

[faiziqb12]

my question is just that how does the wavelength and frequency of sound wave change when it travels from rarer to a denser medium .......
and whatever is your solution please give a briefer insight into it..

NOTE:
i was recently going through a physics olympiad paper and i found from a question that when the above type of transition occurs ; from rarer to denser medium , the wavelength of the sound wave increases..

please assist!
thanks in advance!

 

[insightful]

What happens to the speed of sound in a denser medium?

What equation relates speed, frequency, and wavelength?

 

[faiziqb12]

What happens to the speed of sound in a denser medium?

What equation relates speed, frequency, and wavelength?

the speed of sound increases.....
but does it increase due to an increase in frequency or wavelength and how?

 

[haruspex]

the speed of sound increases.....
but does it increase due to an increase in frequency or wavelength and how?

How would it be possible for the frequency to change?

 

[faiziqb12]

How would it be possible for the frequency to change?

yes , you are right
the frequency doesn't change for a given energy input in diffrent media......
so it must be the wavelenth that causes the increase in speed in denser media...

 

[insightful]

so it must be the wavelenth that causes the increase in speed in denser media...

I think of it the other way around. Consider a line of people at an airport with a "people-mover" (horizontal conveyor). On the floor, they pass you at a frequency of 1/s, and all walk at 1m/s. They step on the conveyor, which moves at 1m/s relative to the floor, while maintaining their 1m/s relative to the conveyor. You stand stationary on the floor next to the conveyor. What is their speed? What is their frequency? What is their "wavelength" (spacing)? Think about it.