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# Double slit experiment watch

1. How would you explain the double slit experiment in the simplest way possible but not missing out any physics.
2. (Original post by Anonymous1502)
How would you explain the double slit experiment in the simplest way possible but not missing out any physics.
I'm just going to give you a few key bullet points here, but if you have any more questions then feel free to ask!

• What is the point?!: The double-slit experiment is important for two reasons; it can be used to find wavelength, and it proves that light interferes (thus providing evidence for the wave nature of light).
• What it involves: Light passes through a single slit first (to make it coherent, otherwise you would just end up with a lot of interference), and then a double slit. This makes the light diffract through the double slits, which then interfere with each other to produce light/dark fringes.
• Calculating wavelength: The formula is w = λD/s, where w is the fringe spacing, λ is the wavelength, D is the slit-screen distance, and s is the slit separation. All of these are measured in metres.

I think that's about it, hope this helps!

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Updated: November 5, 2017
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