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An electron falling from one energy level to another emits a photon of wavelength 550nm. What is the difference between the two energy levels?

The key equation is that of the energy of a photon. E = hc/ λ​ Using λ​ = 550nm gives E = 3.61x10^-19J (Remember that a nanometer is 1x10^-9 m ). Using the conservation of energy, the energy of this photon m...
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Answered by Jamie L. • Physics tutor
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To what extent can judicial subservience be held to represent a 'new settlement' with regard to constitutional authority in England and Wales?

The principle of the 'sovereignty of Parliament'[1] was popularised by A.V. Dicey in the late 19th century.[2] He advocated a traditional absolutist conception of Parliamentary sovereignty, something also ex...
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Answered by Andy L. • Law tutor
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Find the square root of i

When dealing with powers of complex numbers, always start by putting the quantity into exponential form. i has a magnitude of 1 and an argument of π/2 . Using Euler's formula, i = exp(iπ/2) Now the expressio...
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Differentiate the function y=(6x-1)^7

Problems of this style are solved using the chain rule. To begin, define the quantity inside the brackets as u u = 6x-1 such that y = u^7 It is now useful to write the chain rule. We can see dy/dx = du/dx x ...
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Answered by Jamie L. • Maths tutor
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Which A-level modules did you take?

C1, C2, C3, C4 M1, M2, M3 S1, S2, S3 FP1, FP2
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Answered by Michael W. • Maths tutor
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