Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NTA Abhyas JEE Main2020PhysicsWave OpticsPractice

In YDSE apparatus as shown in figure wavelength of light used in λ . The screen is moved away from the source with a constant speed V. Initial distance between screen and plane of slits was D . Suppose P is the point where 5 t h order maxima was lying at t = 0 , then after how much time third-order maxima will lie at this point P on that screen?

Options

  1. A2 D V
  2. B2 D 3 V
  3. C3 D 2 V
  4. D3 D V

Correct answer

B. 2 D 3 V

Step-by-step solution

At t = 0 ,   Δ x = 5 λ = y d D .....(i) After t times Δ x 1 = 3 λ = y d D + v t ......(ii) Dividing (i) and (ii) we get 5 3 = D + v t D 5 D = 3 D + 3 v t 2 D = 3 v t     ⇒     t = 2 D 3 v

Practice Wave Optics on Quantrex Academy →

More from Wave Optics

In the List-I, four optical effects are mentioned. The physical phenomena of light which are essential to describe these optical effects are given in List-II. Choose the option whi 2026In a single slit diffraction experiment, a slit of width (0.016 0.002) mm is used to measure the wavelength of a monochromatic light source. In the diffraction pattern, the angular 2026As shown in the figure, a ray AB of unpolarized light enters from water of refractive index n_w = 4/3 into a medium of refractive index n_p = 4/ 3 after passing through a glass pla 2026Some distant star is to be observed by some telescope of diameter of objective lens a , at an angular resolution of 3.0 10⁻⁷ radian. If the wavelength of light from the star reachi 2026In a Young double slit experiment, the wavelength of incident light is 6000 Å, the separation between slits S₁ and S₂ is 5 cm and the distance between slits plane and screen is 50 2026In interference experiment the path difference between two interfering waves at a point A on the screen is /3 , where is the wavelength of these waves, and at another point B the p 2026An unpolarized light of intensity I_o passes through polarizer and then through a certain optically active solution and finally it goes to analyser. If the angle between analyser a 2026The maximum intensity in a Young's double slit experiment is I₀ . Distance between the slits ( d ) is 5 , where is the wavelength of light used. The intensity of the fringe, exactl 2026 Full Wave Optics list All NTA Abhyas JEE Main PYQs