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Derive the formula for the maximum kinetic energy of an electron emitted from a metal with work function energy p , that is illuminated by light of frequency f.

The phenomenon this question relates to is the photoelectric effect, and it can only be explained using Einstein’s photon model of light. Electromagnetic waves are emitted in discrete lumps of energy, called...
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Answered by George R. • Physics tutor
23394 Views

Why law?

Whilst I didn't study law at A-level I now study LLB Law at the University of Liverpool and find it exciting and stimulating. I would love to have the opportunity to give A-Level students the knowledge, unde...
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Answered by Lauren C. • Law tutor
4680 Views

Why maths?

Maths has always been a passion of mine from a young age. I've always enjoyed helping others with their maths as I find it extremely stimulating.
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Answered by Lauren C. • Maths tutor
5060 Views

How do you show that two lines do, or do not intersect?

How you should approach a question of this type in an exam Say you are given two lines: L 1 and L 2 with equations and you are asked to deduce whether or not they intersect. For example: L 1: r 1 = (a 1 ,b 1...
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Answered by George R. • Maths tutor
136053 Views

Why is supply side policy used a lot in modern economies?

Supply Side policy is basically anything that improves the long run growth of an economy. By that, we mean, anything that can help it grow in the long run sustainably, thereby avoiding 'bad' inflationary pre...
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Answered by Will O. • Economics tutor
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