Two coherent light sources each of wavelength $\lambda$ are separated by a distance $3\lambda$. The total number of minima formed on line AB which runs from $-\infty$ to $+\infty$ is:

Q. Two coherent light sources each of wavelength $\lambda$ are separated by a distance $3\lambda$. Find the total number of minima formed on the line $AB$ which runs from $-\infty$ to $+\infty$.

Q. Two coherent light sources $P$ and $Q$ each of wavelength $\lambda$ are separated by a distance $3\lambda$ as shown. The maximum number of minima formed on line $AB$ which runs from $-\infty$ to $+\infty$ is:

(correct answer + 1, wrong answer - 0.25)

Q. Two coherent sources, emitting waves of wavelength $\lambda$, are placed at a separation of $3\lambda$. A detector is moving around them on a large circle. The number of minima detected by it in one complete rotation is

Q. Two monochromatic coherent point sources $S_1$ and $S_2$ are separated by a distance $L$. Each source emits light of wavelength $\lambda$, where $L>>\lambda$. The line $S_1{S}_2$ when extended meets a screen perpendicular to it at a point $A$.

Q. Two coherent sources emit light of wavelength $\lambda$. separation between, $d=4\lambda$. If the detector moves along the x-axis beginning from $S_2$, the maximum number of minima observed is :