Physics · Interference: Young's double-slit experiment and expression for fringe width, coherent sources and sustained interference of light
In Young's experiment with white light, the central fringe is white. If now a tr
In Young's experiment with white light, the central fringe is white. If now a transparent film is introduced in the upper beam coming from the top slit, then the white fringe:
- A. moves downward
- B. moves upward
- C. remains at the same place
- D. totally disappears
Step-by-step solution
Introducing a transparent film in the upper beam increases its optical path length. To maintain zero path difference at the central bright fringe, the fringe shifts downward where the upper beam's geometrical path is shorter, thereby compensating for the added optical path.
Related MCQs
- The condition for constructive interference is path difference should be equal to :…
- Initially interference is observed with the entire experimental set up inside a chamber filled with air, Now the chamber is evacuated. With …
- Two monochromatic (wavelength and coherent source of electromagnetic waves are placed on the -axis at the point \) and . \) A detector moves…
- In a Young's double slit experiment, constructive interference is produced at a certain point The intensities of light at due to the individ…
- Two coherent monochromatic light beams of intensities and are superposed. The maximum and minimum possible intensities in the resulting beam…