In YDSE setup see figure- the screen moves towards the cardboard with speed v- If the distance between the slits is d and the distance between the screen and silts is D d - D and - is the wavelength of the light used- then the INCORRECT option isA- The central fringe remains at restB- The speed of 2nd bright fringe with respect to screen is 2 - v - dC- All the fringes shrink towards the central oneD- The fringes above the central one move upward

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Byju's Answer

Standard XII

Physics

Matter Waves

In YDSE setup...

Question

In YDSE setup (see figure), the screen moves towards the cardboard with speed v. If the distance between the slits is d and the distance between the screen and silts is $D (d ≪ D)$ and $λ$ is the wavelength of the light used, then the INCORRECT option is

All the fringes shrink towards the central one

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The speed of 2nd bright fringe with respect to screen is

\frac{2 λ v}{d}

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The central fringe remains at rest

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The fringes above the central one move upward

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Solution

The correct option is D The fringes above the central one move upward
As the screen moves towards the slits, the fringes shift closer to the central fringe

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In YDSE setup (see figure), the screen moves towards the cardboard with speed v. If the distance between the slits is d and the distance between the screen and silts is D(d≪D) and λ is the wavelength of the light used, then the INCORRECT option is

The correct option is D The fringes above the central one move upwardAs the screen moves towards the slits, the fringes shift closer to the central fringe

In YDSE setup (see figure), the screen moves towards the cardboard with speed v. If the distance between the slits is d and the distance between the screen and silts is $D (d ≪ D)$ and $λ$ is the wavelength of the light used, then the INCORRECT option is

The correct option is D The fringes above the central one move upward
As the screen moves towards the slits, the fringes shift closer to the central fringe