Wave Optics - JEE Advanced PYQ | Last 5 years | PYQ Khazana #jeeadvancedPYQ
In a Young's double slit experiment, each of the two slits A and B, as shown in the figure, are oscillating about their fixed center and with a mean separation of 0.8 mm. The distance between the slits at time t is given by d=(0.8 + 0.04 sin wt) mm where @ = 0.08 rad s-1. The distance of the screen from the slits is 1 m and the wavelength of the light used to illuminate the slits is 6000 A. The interference pattern on the screen changes with time, while the central bright fringe (zeroth fringe) remains fixed at point O. The 8th bright fringe above the point O oscillates with time between two extreme positions. The separation between these two extreme positions, in micrometer (um), is___. The maximum speed in um/s at which the 8th bright fringe will move is_____. A point source S emits unpolarized light uniformly in all directions. At two points A and B, the ratio r = lA/lg of the intensities of light is 2. If a set of two polaroids having 45° angle between their pass-axes is placed just before point B, then the new value of r will be____. A parallel beam of light strikes a piece of transparent glass having cross section as shown in the figure below. Correct shape of the emergent wavefront will be (figures are schematic and not drawn to A double slit setup is shown in the figure. One of the slits is in medium 2 of refractive index n2. The other slit is at the interface of this medium with another medium 1 of refractive index n(# n2). The line joining the slits is perpendicular to the interface and the distance between the slits is d. The slit widths are much smaller than d. A monochromatic parallel beam of light is incident on the slits from medium 1. A detector is placed in medium 2 at a large distance from the slits, and at an angle 0 from the line joining them, so that 0 equals the angle of refraction of the beam. Consider two approximately parallel rays from the slits received by the detector Which of the following statement(s) is(are) correct? (A) The phase difference between the two rays is independent of d. (B) The two rays interfere constructively at the detector. (C) The phase difference between the two rays depends on n but is independent of n2. (D) The phase difference between the two rays vanishes only for certain values of d and the angle of incidence of the beam, with 0 being the corresponding angle of refraction Which of the following statement(s) is(are) correct? (A) The phase difference between the two rays is independent of d. (B) The two rays interfere constructively at the detector. (C) The phase difference between the two rays depends on n but is independent of n2. (D) The phase difference between the two rays vanishes only for certain values of d and the angle of incidence of the beam, with 0 being the corresponding angle of refraction Download JEE Main & Advanced PYQs https://1learn.in/new-courses/43/cont... Enrol in InfinIITy 2.0 Dropper Batch: https://1learn.in/new-courses/71-infi... ProdJEE batch (Class 12): https://1learn.in/quick-pay/10/65 EnerJEE batch (Class 11) https://1learn.in/quick-pay/10/64 👉Whatsapp: https://whatsapp.com/channel/0029Va9s... 👉Telegram: https://t.me/jeeudaan ✅Download JEE One App for Unlimited Free study material & TESTS in NTA pattern) : https://bit.ly/3vc809M #jee1 #jeeone #jeeadvanced #jeemains #iitjee #exampreparation #competitiveexams #problemsolving #examtips #jeemain2026 #jeeadvanced2026 #jeeadvanced2027 #jeemain2026news #jeemain2027news #jeemain2027 #previousyearquestions #tipsandtricks #testtakingstrategies #jeepreparation #jeemainnews #jeeadvancedpreparation #jeeadvancedsolutions #jeeexamtips #jeepractice #pyq #teamudaan #jeeadvancedpyq #waveoptics #jeephysicsquestions #physicspyq jee 1,namo kaul,nta news,jee main 2026 news,jee main news,jee main 206 latest update,jee main 2026 update,jee main 2026 latest news,nta latest news,jee advanced 2026,jee advanced 2026 strategy,strategy for jee advanced 2026,strategy for jee advanced,jee advanced preparation strategy 2026,jee advanced 2026 preparation,jee 2026 roadmap,strategy for jee 2026,jee 2026 preparation strategy,jee advanced strategy,jee advanced block strategy,jee advanced 2026 mcq,jee advanced 2027,jee main 2027 strategy,jee main 2027 preparation,jee 2027 roadmap,strategy for jee 2027,jee 2027 preparation strategy,important jee main 2027 pyq,jee main 2027 previous year questions,jee main 2027 mcq,jee advanced toughest questions,jee adavnced toughest problems,jee advanced problem solving,important jee advanced 2026 pyq,jee advanced physics pyq,physics important pyq,previous year question paper for jee advanced,jee advanced previous year physics questions,physics important pyqs,jee advanced 2026 previous year questions,important jee advanced pyqs,important jee advanced topics,physics important topics
