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Oscillations and Waves
Quick questions on Diffraction of waves explained: H2 Physics Oscillations and Waves
5short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the wavelength-to-width ratio?Show answer
The amount of spreading depends on how the aperture width compares with the wavelength :
What is the single-slit pattern?Show answer
When monochromatic light passes through a single narrow slit, it produces a pattern with a bright, wide central maximum flanked by progressively dimmer secondary maxima, separated by dark minima. The first minimum occurs at an angle given by:
What is q1?Show answer
State the condition under which a wave diffracts most strongly at an aperture. [1 mark]
What is q2?Show answer
A single slit of width is illuminated by light of wavelength . Find the angle of the first minimum. [2 marks]
What is q3?Show answer
Explain how the single-slit diffraction pattern changes when the slit is made narrower. [2 marks]
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