Physics - Optics: Single Slit Diffraction (2 of 15) Basics 2: What Causes Diffraction?

In this video I will explain what causes diffraction.

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[mahadevankm]

Thanks Michel. I was taught this at school but I forgot about it . You repeating the concepts jogged my memory.

[valeriereid]

Thanks so very much for explaining this so well.

[sandorfogassy]

Yes, the drawing does seem confusing. It would seem that they would need to strike at the same point to have deletion.

[duduzenkie]

Thanks again you're the best teacher I found

[ibrenecario]

The drawing is very bad.
He tells that light will travel further, and he shows two parallel that is not correct.
What he means is two lines that hit SAME spot on wall then one of lines would have traveled further.