Draw a labelled plot of the spectral characteristics of blackbody radiation for three different blackbody temperatures (three plots). comment on three key features of these plots. explain why the spectrum of sunlight shows some differences with a corresponding blackbody spectrum. b) (8 marks) describe the construction, principle of operation and applications of a light emitting diode (led). c) (6 marks) draw the i-v characteristics of a light emitting diode. mark on your graph the region where light emission is strongest. discuss the similarities and differences between light emitting diodes and laser diodes.

wind moving at higher speeds will transfer more energy to the water, resulting in stronger waves.

we have been given a quadratic function and we need to restrict the domain such that it becomes a one to one function.

we know that vertex of this quadratic function occurs at (5,2).

further, we know that range of this function is .

if we restrict the domain of this function to either or , it will become one to one function.

let us know find its inverse.

upon interchanging x and y, we get:

let us now solve this function for y.

hence, the inverse function would be if we restrict the domain of original function to and the inverse function would be if we restrict the domain to .

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