K.C.S.E Physics Q & A - MODEL 1996PP2QN07
(a) Describe with the aid of a diagram an experiment set up for observing photoelectric effect
(b) Table 2 shows the relationship between the wavelength, of a radiation falling on the surface and the energy, k of the emitted electrons
(i) Plot a graph of energy k ( y – axis) against the frequency, f, of the incident light
(ii) Determine the work function Φ of the surface used (Speed of light, c = 3.00 * 108 ms-1 planks constant h = 6.663 * 10-34JS)
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