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How does an optical fibre transfer light?

To understand how an optical fibre transfers light, we must first understand the concept of 'total internal reflection'. Whenever light is refracted from one medium to another, the refractive index of the se...
AS
Answered by Akshay S. • Physics tutor
2494 Views

Prove that 1/sin(2theta) - cos(2theta)/sin(2theta) = tan(theta)

Before we begin to approach this question, we first write down all the relevant formulae for this trigonometry question. We can see that we will need the double angle formulae (on account of the presence of ...
CM
Answered by Colin M. • Maths tutor
22596 Views

What are some techniques to remember dates?

Dates are just a way of ordering history. Timelines are the most traditional way of learning the order of events, perhaps challenge yourself to remember 5 dates/events on a timeline each week. If you have to...
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Answered by Robyn V. • History tutor
2745 Views

How can I deliver a good answer under strict exam time limits?

Think pragmatically. If you have 2 hours to answer 4 questions, you need to stop yourself after 30 minutes, no leniency. Be concise and consider improving your language, think compactly and plan your answer ...
RV
2436 Views

Dans une pâtisserie on peut chercher....

Un gâteau
RR
Answered by Rebecca R. • French tutor
2811 Views