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When we see light, the colour of light that we see is determined by the wavelength of the light. Violet light has the shortest wavelength, and red light has the longest wavelength. Red shift happens when ...

If I was helping prepare a student for an oxbridge interview I would begin by reminding them not to rush into the answer, explaining that tutors want to see your logical thinking process, and that rushing...

Imagine we have a wave that is travelling from left to right. This is the wave's direction of motion, or what is sometimes called the direction of "energy propagation". In a transverse wave the ...

Demand is the total amount of goods and services that consumers are willing and able to purchase at a given price in a given time period. The Law of Demand states that as the price of a p...

To solve this, we need to factorise the expression (write as a product of two brackets). To do this we want to find to numbers that multiply to make +6 and add up to -5, for this case. These numb...