Practice Fringe Positions (3.2) - Wave Optics

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6 sample questions

Question 1.
What equation defines the position of bright fringes in an interference pattern?
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Think about constructive interference.
Question 2.
What equation defines the position of dark fringes in an interference pattern?
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Remember it occurs at half wavelengths.
3Question 3.
What equation defines the location of bright fringes?
- Δx = nλ
- Δx = (n + 1/2)λ
- Δx = λ/n
- Δx = 2nλ
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Recall how constructive interference is defined.
4Question 4.
True or False: Dark fringes appear where constructive interference occurs.
- True
- False
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Think about the patterns created by wave interactions.
Question 5.
In a double-slit experiment, if the wavelength used is 550 nm and the distance between the slits is 0.5 mm, calculate the position of the fourth dark fringe observed on a screen 1.5 meters away.
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Consider how far the pattern spreads when light reaches the screen.
Question 6.
A coherent light source produces 50 fringes in a 2 m path. Find the wavelength used if the slit distance is 0.4 mm.
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Use the known values to solve step-by-step.

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