Select the incorrect statement. For stable interference to occur between two sets of waves,

If the path difference between two waves at a point is $29 \lambda$, then the point will be,

The optical path difference between two light waves arriving at a point simultaneously is $260 \frac{\lambda}{4}$. The point is,

The optical path difference between two light waves arriving at a point simultaneously is $130 \frac{\lambda}{2}$. If the path difference is $650\times {10}^{-5} \mathrm{cm}$, then the wavelength of light will be,

If two waves represented by, $y_1=4\sin \omega t$ and $y_2=3\sin \left(\omega t+\frac{\pi }{3}\right)$ interfere at a point, then the amplitude of the resulting wave will be about,

Two point sources $X$ and $Y$ emit waves of same frequency and speed but $Y$ lags in phase behind $\mathrm{X}$ by $2\pi l \mathrm{rad}$. If there is a maximum in direction $D$, the distance $XO$ using $n$ as an integer is given by,

Two coherent waves of intensities $I$ and $4I$ interfere at a point. If the resultant intensity is $3{I}$, then the phase difference between the two waves at the point is,

In a movie hall, the distance between the projector and the screen is increased by $1\%$. Illumination on the screen is,