Physics · 2020
JEE Main · 6 September 2020, Shift 1 · Q16
In the figure below, P and Q are two equally intense coherent sources emitting radiation of wavelength 20 m. The separation between P and Q is 5 m…
In the figure below, P and Q are two equally intense coherent sources emitting radiation of wavelength $\displaystyle 20$ m . The separation between P and Q is $\displaystyle 5$ m and the phase of P is ahead of that of Q by $\displaystyle 90$°. A, B and C are three distinct points of observation, each equidistant from the midpoint of PQ. The intensities of radiation at $\displaystyle \mathrm{A}, \mathrm{B}, \mathrm{C}$ will be in the ratio :
Official answer
(1)
$\displaystyle 2$ : $\displaystyle 1$ : $\displaystyle 0$
More from Wave Optics
- ' n ' polarizing sheets are arranged such that each makes an angle 45^° with the preceeding sheet. An unpolarized light of intensity I is incident…2023
- If the measured angular separation between the second minimum to the left of the central maximum and the third minimum to the right of the central…2025
- In interference experiment the path difference between two interfering waves at a point A on the screen is λ / 3, where λ is the wavelength of these…2026
- In the Young's double slit experiment, the distance between the slits varies in time as d(t)=d_0+a_0 sin ω t; where d_0, ω and a_0 are constants. The…2021
- A monochromatic light wave with wavelength λ_1 and frequency ν_1 in air enters another medium. If the angle of incidence and angle of refraction at…2023
- As shown in the figure, in Young's double slit experiment, a thin plate of thickness t=10 μ m and refractive index μ=1.2 is inserted infront of slit…2023
- Unpolarised light of intensity 32 Wm^-2 passes through the combination of three polaroids such that the pass axis of the last polaroid is…2023
- Given below are two statements: Statement I: In a Young's double slit experiment, the angular separation of fringes will increase as the screen is…2026
JEE Main 2020 Physics question, with the answer from NTA’s final answer key. Where our answers come from.