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You have a layer of glass with a refractive index of 1.5 and the glass is surrounded by air. A light ray shines into the glass and Total Internal Reflection occurs at the glass-air boundary. What is the critical angle?

This question tests your knowledge of Snell's law, Total Internal Reflection (TIR) and the fact that the refractive index of air is 1 (which should be memorised as it is in the exam). The critical angle is t...
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Answered by Kelvin C. • Physics tutor
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Explain 2 evaluation points of the BSRI (Bem Sex Role Inventory) (6 marks)

The BRSI appears to be a valid and reliable measuring scale for androgyny as there is support from a pilot study of 1000 students using the BRSI, and their results reflected their own descriptions of their g...
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Answered by Emily T. • Psychology tutor
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Integrate x^2 + 1/ x^3 +3x +2 using limits of 1 and 0

By noticing the the numerator (x^2 + 1) is similar to the derivative of the denominator (x^3 +3x +2) you can integrate the function by using natural logarithms, to form the logarithm ln( x^3 +3x +2). However...
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Answered by Aaron T. • Maths tutor
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How can you work out what agrees with what in a Latin sentence?

Let’s take this sentence from Virgil's Aeneid , Book 2 : 'tempus erat quo prima quies mortalibus aegris incipit et dono divum gratissima serpit' . Let's analyse each ending. First, sort the nouns from the ve...
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Answered by Alice B. • Latin tutor
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I don’t understand poetry! How do I go about analysing a poem?

First of all- don’t be intimidated by poetry! Think about it as nothing more than a set of words arranged in a specific order. It’s down to us to add some meaning to that order. It’s like a puzzle and you ha...
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Answered by Alice B. • English tutor
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