Exam-style question
Try this first
Explain how the fringe spacing in Young's double-slit experiment changes if the wavelength of light is increased while keeping the distance between the slits and the screen constant.
Model answer
What a good answer should say
- If the wavelength of light is increased, the fringe spacing will also increase.
- This is because fringe spacing is directly proportional to the wavelength in the formula x = (λD) / d.
Explanation
Why this works
This question assesses understanding of the relationship between wavelength and fringe spacing in the context of wave interference. It requires a clear explanation of how changes in one variable affect another in the double-slit experiment.
Common mistake
No common mistake is linked to this question yet.