Diffraction of sound waves is more evident than light waves in daily life because:

Following are expressions for four plane simple harmonic waves:
$(i) \, y_1 = A \cos 2\pi \left( n_1 t + \frac{x}{\lambda_1} \right)$
$(ii) \, y_2 = A \cos 2\pi \left( n_1 t + \frac{x}{\lambda_1} + \frac{1}{2} \right)$
$(iii) \, y_3 = A \cos 2\pi \left( n_2 t + \frac{x}{\lambda_2} \right)$
$(iv) \, y_4 = A \cos 2\pi \left( n_2 t - \frac{x}{\lambda_2} \right)$
The pairs of waves which will produce destructive interference and stationary waves respectively in a medium are:

The time of reverberation of a room $A$ is $1 \; s$. What will be the time (in seconds) of reverberation of a room,having all the dimensions double of those of room $A$?

$A$ stretched uniform wire of length $L$ under tension $T$ is vibrating with fundamental frequency $n$. $A$ closed pipe of the same length $L$ is also vibrating with the same fundamental frequency $n$. If the tension $T$ is increased by $16 \,N$, the wire resonates with the $2^{\text{nd}}$ harmonic of the same closed pipe. The initial tension in the wire is: (in $\,N$)

$A$ massless rod is suspended by two identical strings $AB$ and $CD$ of equal length. $A$ block of mass $m$ is suspended from point $O$ such that $BO$ is equal to $x$. Further,it is observed that the frequency of the $1^{st}$ harmonic (fundamental frequency) in $AB$ is equal to the $2^{nd}$ harmonic frequency in $CD$. Then,the length of $BO$ is:

The superposing waves are represented by the following equations: ${y_1} = 5\sin 2\pi (10t - 0.1x)$ and ${y_2} = 10\sin 2\pi (20t - 0.2x)$. The ratio of intensities $\frac{I_{\max}}{I_{\min}}$ will be: