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Using Fermat's Principle explain why it makes sense for light be refracted when crossing from one medium into another that has a different refractive index.

Fermat's Principle states that light will always take the path of least travel TIME (NOT DISTANCE), at a first glance it appears that the path of least time would be a straight line from A to B, but this isn...
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Answered by Sam H. • Physics tutor
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What is meant by 'intertextuality'?

A key part of A-level English Literature is understanding the context of texts. We should note that when we are reading something, what we are reading is very often inseparable from a network of ideas and in...
AS
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How do you write an essay on a character without just being descriptive?

I think there are two key points to this answer. Firstly, that though a question may just say 'discuss character X', what its really asking is 'how does character X develop' - its very rare to find a totally...
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Is there a serious threat to the unity of the UK?

Successful arguments would include the following structure and details: How close the Scottish referendum was, whether a second one is imminent, satisfaction with current level of devolution, lack of real ch...
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Answered by Max Y. • Politics tutor
2872 Views

The affluent have a moral duty to alleviate world poverty

Impossible to write a full answer in just two paragraphs, but successful answers will cover the following: "Child drowning in pond" analogy, exploration of the difference or lack thereof between sa...
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Answered by Max Y. • Philosophy tutor
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