Question

Someone please help me, I'll give you brainliest!!! (For Dark Paradox)

Answer 1

$\qquad\qquad\huge\underline{{\sf Answer}}$

If two similar waves are traveling in the same medium, then they have same wave velocity. so we can infer that

$\qquad \tt \dashrightarrow \:v_A = v_B$

Now, as per the formula ~ we know that :

$\qquad \sf \dashrightarrow \:v = \lambda \cdot f$

• v = wave velocity

• λ = wavelength

Now, we can write it as :

$\qquad \sf \dashrightarrow \: \lambda_A \cdot f_A = \lambda _B \cdot f_B$

And it's also given that frequency of wave A is 3 times that of frequency of wave B.

So, let's add the relation to our equation ~

$\qquad \sf \dashrightarrow \: \lambda_A \cdot3f_B = \lambda _B \cdot f_B$

$\qquad \sf \dashrightarrow \: \lambda_A \cdot3= \lambda _B$

$\qquad \sf \dashrightarrow \: λ_A = \frac{1}{3} λ_B$

So, choice C is correct ~