Young's Double Slit Experiment - A Level Physics

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This video introduces and explains Young's double slit experiment for A Level Physics.

Everyone loves lasers in Physics. Young's double slit experiment uses the constructive interference and destructive interference of light from a laser to calculate and measure the wavelength of light. We need the separation of the slits, distance to the screen and separation of the light and dark fringes. You can do this practical without a laser as well.

Thanks for watching,

Lewis

This video is recommended for anyone studying A Level Physics in the following exam boards:
AQA
CIE
Edexcel
Edexcel IAL
Eduqas
IB
OCR A
OCR B
WJEC

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What I learnt from this video: I'm not the only person who misspells "separation" all the time.

candleinthewind

AQA use the letter 's' for slit separation, not the letter 'a' as in the video. The equation on the data sheet is w=(lambda x D)/s. Great stuff, well done!

davegrainger

Do you guys read the comments? You only have to mention the miss spelling of separation once...

thetobster

Thank you very much sir, you helped me a lot, and now i really understand this topic

Manjndnxjx

If you count the distance between 10 peaks, that is 9 fringe spaces so you have to divide by 9 not 10

flider

This is worse than the walking dead! Your ending cliffhangers are the worst!

alphabro

Your website has all the practicals required for year 12 practicals but this video is not included. Which one do recommend as better: this one or "Measuring wavelength of light with a Double slit" video

Eltzz

Good explanation.
May I know the type of pen that you are using, it looks like a pilot. Could you give the actual brand. Thank you,

secondteacher

Do we need to worry about the angle stuff in this topic? Like when you have sin x feta = lambda/a

petyrbaelish

Is a the actual distance of the gaps themselves (slits) or the distance between the two gaps (i.e. the part in the middle, which absorbs the waves)??

willaustin

I'm so grateful for these videos - they've helped a lot!! (though you did spell separation incorrectly several times)

oliviashiels

for the experiment with the single slit and double slit how would the fringe pattern look?

kamal

how can you calculate phase difference between the two light waves that meet on the screen?

perpetualtom

I think if that experiment would be replaced with a canon sand( not laser canon) would happen the same thing. It means : the experiment doesn't show anything because sand is particle, that( same thing ) would happen with all things as : sugar grain, salt grain, sand grain etc...( the photon doesn t interfere with itself but crashes with border of slit part (ricocheted the lips/borders of the slit )

radinelaj