What is the single-slit diffraction pattern for monochromatic light?
A broad, bright central maximum bounded by dark minima, with weaker, narrower secondary maxima on either side.
AQA A-level Physics (7408) · 3.3.2.2
Revise AQA A-level Physics (7408) specification point 3.3.2.2, Diffraction, with free active-recall flashcards. Flip through the set or review every question and answer below.
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What is the single-slit diffraction pattern for monochromatic light?
A broad, bright central maximum bounded by dark minima, with weaker, narrower secondary maxima on either side.
How does increasing wavelength affect the angular width of a single-slit central maximum?
It increases the angular width.
How does increasing slit width affect the angular width of a single-slit central maximum?
It decreases the angular width.
Why is the centre of the single-slit diffraction pattern white when illuminated with white light?
The different wavelengths overlap at the centre.
In a white-light single-slit pattern, how are shorter and longer wavelengths distributed away from the centre?
Shorter wavelengths are closer to the centre; longer wavelengths extend farther out.
Can the coloured fringes in a white-light single-slit pattern overlap?
Yes, the coloured fringes can overlap.