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Physics: Post your doubts here!

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Lambda independent, h dependent
Use the same cd throughout and the light should fall on the cd always at the same angle
Use different lasers
Pass the light through a slit
Using different lasers means different wavelengths of light
Measure height using a clamped rule
Take repeeated readings for h and avg them
Now lambda is changed until we have 8 sets of readings
Plot a graph of height against lambda
Straight line that doesnt pass through origin
y intercept gives B , gradient gives n / d

Paper 52 question 1.. are these points okay ?
 
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Does anyone remember the equation for Q2 p5? And what was the expression for gradient?
 
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Where can I get worked solutions of recent(2016 and 2017) physics paper 1?
You can get the solved past papers book from any bookshop. If that is an expensive method(yeah it is not cost-effective), you may search this stuff on google or youtube. You would find at least a couple of them on youtube and google.
 
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Bros, you got any special tips for paper 1? And do send some tough paper 1 questions. I just finished the rest of my AS exams today, so I just got physics paper 1 left.
 
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anything on paper 34 on 30th may 2018
A few of my friends are giving it, but i am done with my practical(v33). My friends told me there will be a water/thermodynamics experiment. You can ask around if anyone else knows the details about which type of experiments are coming up.
 
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