A wave is travelling from one medium into another. The wavelength is changed as
ID: 2062353 • Letter: A
Question
A wave is travelling from one medium into another. The wavelength is changed as it moves into each new medium as is shown in the image.
A) If the thickness of each section is the same, then 2 = 3 and (3k2/2) = k1 and v3 > v1.
B) If the ratio of thickness of each section is 1:2:3, in order from left to right, then the ratio of the speeds in each section v1 : v2: v3 will be 4: 12 : 9.
C) If the thickness of each section is the same, then 1/k1 = 2/k2 = 3/k3
D)If the thickness of each section is the same, the time it takes the wave to travel through each section of the medium will rank t2< t3< t1 .
E) If the period of the wave increases by 15%, then the wavelength in each segment will decrease by 15%.
F)One of the strongest analytical tools of scientists is finding ratios as a means to compare the relative effect of a change in one parameter upon another.
G) If the ratio of thickness of each section is 1:2:3, and the only difference between the three materials that the wave is travelling through is the density; then the density ranking must be 1 > 3 > 2 .
H) Since the wavelength in each material varies, the frequency of the wave within the material must vary in order for the wave velocity to remain constant.
I)If the thickness of each section is the same, the frequency of the wave travelling in each section will be the same.
Explanation / Answer
G is true