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Average atomic mass of silicon (Si) = 92.2297%(27.9769265327 amu) + 4.6832% (28.97649472 amu) + 3.0872% (29.97377022 amu) = 0.922297 (27.9769265327 amu) + 0.046832(28.97649472 amu) + 0.030872(29.97377022 amu) = 25.80303541 amu +1.35702720 amu +0.92535023 amu = 28.08541284 amu = 28.09 amu
Energy = 0.720 J Planks constant, h = 6.63x10-*Ls Velocity of light, c = 3x10 m/s 10 Wavelength of the the light, 1 = 615 mm x m = 6.15x10-m 1 nm Energy,E = vtc No of photons = h EX (0.720 J) (6.15x10-'m) = 76.63x10-34 5.5)(3x10 m/s) = 2.23x1018
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