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Why bother with a post grad? Are they even worth it? Have your say! 26-10-2016
    • Thread Starter

    Hi. I just wanted to ask a quick question in regards to c i) and d parts.
    For c i) , I worked it out to be 8/3 mm from O to B ( O to A would be {4 mm / 3} * 2) but in the mark scheme, it says 2mm. Could you tell me where I going wrong or is there an error in the mark scheme?
    For d), wouldn't the path difference be, at A, 1.5lambda because of 2nd order minima as oppose to 2lambda which is what is stated in the mark scheme.
    Thank You.

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    Posted from TSR Mobile

    I think the diagram in the question is wrong. The original question is shown below.
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    • Thread Starter

    You are awesome.
    Thank You.

    Posted from TSR Mobile
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