If the monochromatic source in Young's double slit experiment is replaced by white light,
1. There will be a central dark fringe surrounded by a few coloured fringes
2. There will be a central bright white fringe surrounded by a few coloured fringes
3. All bright fringes will be of equal width
4. Interference pattern will disappear
If the monochromatic source in Young's double slit experiment is replaced by white light,
1. There will be a central dark fringe surrounded by a few coloured fringes
2. There will be a central bright white fringe surrounded by a few coloured fringes
3. All bright fringes will be of equal width
4. Interference pattern will disappear
- interference pattern will disappear.
- there will be a central dark fringe surrounded by a few coloured fringes
- there will be a central bright white fringe surrounded by a few coloured fringes.
- all bright fringes will be of equal width
The Correct Option is C
Approach Solution - 1
In Young's double slit experiment, when a monochromatic source is replaced with white light, the interference pattern changes due to the composition of white light, which consists of multiple wavelengths.
- Central Fringe: The central fringe will be bright and white because every wavelength of light is in-phase at the center, resulting in constructive interference.
- Surrounding Fringes: As you move away from the center, different wavelengths recombine differently, leading to dispersion and the formation of colored fringes. Each color corresponds to a different wavelength experiencing constructive or destructive interference at various points.
Therefore, the correct answer is that there will be a central bright white fringe surrounded by a few colored fringes.
Approach Solution -2
Interference with White Light in Young's Double-Slit Experiment
Step 1: Understand the Nature of Interference with White Light
White light consists of multiple wavelengths. In Young’s double-slit experiment, each wavelength creates its own interference pattern.
Step 2: Analyze the Central Fringe
At the center (x = 0), all wavelengths interfere constructively, producing a bright white fringe.
Step 3: Analyze the Surrounding Fringes
For higher orders, different wavelengths interfere differently, leading to overlapping colored fringes.
Step 4: Conclude
The central fringe is bright white, and a few colored fringes appear around it.
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