Measuring Wavelength of Light with a Diffraction Grating - PRACTICAL - A Level Physics

In this video I go through an AQA Physics A Level Required Practical that uses a diffraction grating experiment to investigate the properties and to measure the wavelength of light. (This is AQA Required Practical 2.) This is also the OCR A Level Physics PAG 5.1 Practical.
A laser will diffract and interfere when shone through a diffraction grating. The distance to the first, second and third order maxima can be measured which will then allow the wavelength of the light to be calculated. Be careful with the laser. Do not look at the beam or any reflected light from a shiny surface.
See instructions for all the practicals at www.alevelphysicsonline.com/ye...
Thanks for watching,
Lewis
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[@hrishiv]

A point for anyone reading this in future, the d in the formula is the distance between the lines in the grating, the D used to find the angle is the distance from the grating to the screen, same as in the Double Slit experiment - this is why I tend to use L to denote the distance to the screen, due to the clash in letters.

[@lukemcellin8736]

Ur the free science lessons guy for a level physics

[@silrana7166]

"Thank you,"

[@herantd]

The best explanation out there!

[@TigerSHe]

really nice video, explainations are on point! thanks!

[@FernandoMoreiraR]

great summary!!

[@Opls0707]

Best explanation of Diffraction Grating !

[@aletheabarretto3624]

a blessing to my life

[@minxxdia1132]

explained everything, thankyou!

[@TheCitygear]

아주 깔끔한 설명! Good!

[@asmitaroy2243]

thank you this really helped

[@AnthonyMoody]

great vid!

[@riazrabia]

Great explanation 👏😍 Thanks alot

[@laylaalghizzi1391]

that was really helpful, thank you :->

[@Ashraf-Chowdhury]

Best one out there

[@iccyt2780]

When finding the mean value, do I divide the second order by 2

[@gayandesilva3180]

Thank you

[@barkley2824]

what's his brand of pen that ink looking neat

[@shayhan6227]

This is nice and all but how in the heck did humanity create precision diffraction gratings to get precision measurements of the wavelengths from? This is a like a catch 22 paradox of science history.

[@AnandKumar-nq3wp]

Thanks