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Show that a pulsed spherical wave has a complex wavefunction of the form U(r,t) = (1/r)a(t-r/c) where a(t) is an arbitrary function. An ultrashort optical pulse has a complex wavefunction with a central frequency corresponding to a wavelength λ0 = 585nm and a Gaussian envelope of rms width σ1 = 6fs. How many cycles are contained within the pulse width? If the pulse propagates in free space as a spherical wave initiated at the origin at t = 0, describe the spatial distribution of the intensity as a function of the radial distance at time t = 1ps.
Ask questi‘Social welfare functions embody a normative conception of the relative importance of equity and efficiency’. With the aid of diagrams, illustrate and explain this propos
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Composition of Trade: It is indicative of the structure and level of development of an economy. For instance, most of the UDCs depend for their export earnings on a few primar
Describe Dalton''s law of partial pressures, specification of Dalton''s law of partial pressures, Dalton''s law states that, at a given known temperature total pressure exerted b
If we have two products, A and B, which are substitutes, we can expect that a rise in the price of A (or B) will cause the demand for B (or A) to go up.” Examine this statement wit
Suppose Dlamini has R5 000 to spend on trousers and shirts. The price of trousers is R500 each and that of shirts is R312.50 each. 6.1 Use the information and calculate consumer eq
Ask question using health care as an example explain how markets fail due to different types of externalities arising from jointness in production and consumption
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use a graphical illustration to briefly describe what the influence of an increase in immigrants would be on the market supply of labour
What should be the decent/appropriate growth rate in any country? Answer: A growth rate of among 2-3% is considered normal for mature developed countries; for LICs, 5-7% is
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