State whether the following is true or false, with a reason.
Teacher: The path difference between and at a point P on the screen of two interfering light waves…
Physics20271 markTrue/false
Teacher: The path difference between $S_1P$ and $S_2P$ at a point P on the screen of two interfering light waves is exactly $1\cdot2 \times 10^{-6}\text{ m}$. If the light emitted by the source has a wavelength of $600\text{ nm}$, can anyone tell me whether a bright or a dark fringe will form at the point P?
Student: Dark fringe will be obtained.
