# physics help

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#1
for part ii) i’m not sure what to do, i would’ve worked out the fringe separation (x) in the equation wavelength = ax/D and then used speed = distance/ time, but i’m not sure where to get the wavelength from ...Attachment 1005606
Last edited by slapsticjoe; 1 month ago
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1 month ago
#2
(Original post by slapsticjoe)
for part ii) i’m not sure what to do, i would’ve worked out the fringe separation (x) in the equation wavelength = ax/D and then used speed = distance/ time, but i’m not sure where to get the wavelength from ...Attachment 1005606
What exam board are you?
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#3
(Original post by hannanj0)
What exam board are you?
ocr
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1 month ago
#4
(Original post by slapsticjoe)
ocr
Damn, I feel sorry for you, apparently OCR is horrid

Anyways, you have been given the frequency, so to work out wavelength I would use E=hf=hc/λ
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#5
(Original post by hannanj0)
Damn, I feel sorry for you, apparently OCR is horrid

Anyways, you have been given the frequency, so to work out wavelength I would use E=hf=hc/λ
where are you getting the energy from
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1 month ago
#6
(Original post by slapsticjoe)
where are you getting the energy from
As h=6.63x10^-34, use E=hf to find E, and sub this into E=hc/λ, and rearrange for lambda.

Im AQA btw so it might be a bit different I guess?
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