Diffraction Gratings | A-level Physics | OCR, AQA, Edexcel

[@sadmanles3165]

In the equation d = L/n, both d and L are to be measured in metres. So that means having 600 lines per mm would redirect us to this form: d = (1/600) x 10^-3. This 10^-3 is added to convert the distance in mm to m. So this would mean the final answer of grating spacing would be 1.6667x10^-6. Well made video but the calculation is misleading so hopefully this comment helps people who were as confused as I was

[@littlechewisex3783]

How did u get the power?

[@nakshatrasatheesh8138]

@@littlechewisex3783 bc the length in the question is given in millimetres

[@nakshatrasatheesh8138]

@@littlechewisex3783 wait you asking how the guy got the power in the answer?

[@oyegokeadekola8162]

Exactly, just going through the video and that last calculation should be raised to -3 + -3 = -6

[@philarthur2777]

Could not have been clearer. Thank you.

[@lucalalsie5653]

This is absolute bliss! Thanks!

[@JakeClarke]

I think it should be x10^-6 not x10^-3

[@nakshatrasatheesh8138]

it's from millimetres to metres. so it has to be 10^-3

[@mohamedailam6502]

Do you have a video of detail about nlamda=dsintheeta

[@whymewhyjustwhy]

shouldn't the answer be 6x10 to the power of 6

[@mamicz]

good videos but you literally avoid everything maths lol

[@mackenzietang6908]

The answer is wrong lmao

[@shmifful]

Lool freesciencelesson is better!

[@mackenzietang6908]

@@shmifful wish he did A level physics :(

[@diganbarua7729]

It should be (d= 1÷600) and not (d= 0.001÷600)

[@Mina-gk8jm]

Why not? You gotta convert the length in mm to metres. S.I. units, remember?

[@diganbarua7729]

@@Mina-gk8jm ohh yea i completely forgot that, sorry for bothering you. 🙏🏻❤️