Diffraction (Grade 11 NSC Matric Physical Sciences): Quizzes

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Diffraction
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What is diffraction?

Wave spreading through apertures/edges

When is diffraction most pronounced?

Wavelength comparable to opening size

What is the relationship for diffraction with wavelength λ\lambda and slit width ww?

diffraction ∝λw\propto \frac{\lambda}{w}

How does slit width affect diffraction?

Narrower slits cause more diffraction

What effect does wavelength have on diffraction?

Longer wavelengths diffract more

What creates bright regions in a diffraction pattern?

Constructive interference

Why don't we see light diffraction around everyday objects?

Light wavelength very small vs openings

Which light produces a wider diffraction pattern?

Red light (longer wavelength)

For sin⁡θ=mλw\sin \theta = \frac{m\lambda}{w}, what does mm represent?

Order of the minimum

According to Huygens' principle, what acts as a source of secondary wavelets?

Each point on the wavefront

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