During propagation of a plane progressive mechanical wave incorrect statement is
All the particles are vibrating in the same phase
Amplitude of all the particles is equal
Particles of the medium executes $S.H.M.$
Wave velocity depends upon the nature of the medium
A wave travelling along the $x-$ axis is described by the equation $y\ (x, t )\ =\ 0.005\ cos\ (\alpha x - \beta t )$ . If the wavelength and the time period of the wave in $0.08\ m$ and $2.0\ s$ respectively then $\alpha $ and $\beta $ in appropriate units are
In a Fraunhofer's diffraction obtained by a single slit aperture, the value of path difference for $n^{th}$ order of minima is
A uniform string suspended vertically. A transverse pulse is created at the top most of the string. Then
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 $1^{st}$ harmonic (fundamental frequency) in $AB$ is equal to $2^{nd}$ harmonic frequency in $CD$. Then, length of $BO$ is
Two cars $A$ and $B$ are moving in the same direction with speeds $36\, km/hr$ and $54 \,km/hr$ respectively. Car $B$ is ahead of $A$. If $A$ sounds horn of frequency $1000\, Hz$ and the speed of sound in air is $340\, m/s$, the frequency of sound received by the driver of car $B$ is ..... $Hz$