Man, I don't want to be a buzzkill but a flashlight will not work for this experiment like you stated in the beginning. You do need a single wavelength, like you mentioned later in the presentation. You need to fix the beginning as to not confuse people even more.
At first I was a little disrurbed, but at the same time it's quite hillarious. However, I could only give you a 4 because you are getting christmas mixed up with easter. Other than that, I chuckled. ^^
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