(15a) This is because neutron is very light when compared with alpha particle (15b) i. They are negatively charged ii. They can cause florescent iii. They can ionize gases at high tempature iv. They are fast moving electron (15c) Given, wavelength = 5.0*10^-7m = 7.0*10^-7m i. Blue light has a greater number of electrons because it has a shorter wavelenght ii. red light has higher maximum kinetic energy because it was first deflected (15di) Given Wo = 2.0eV, wavelenght= 5.0*10^-7m i. Wo = hf, Wo= 2*1.6*10^-19 =3.2*10^-19J 3.2*10^-19 = 6.6 *10^-34*Fo Fo = (3.2*10^-19 )/ (6.6*10^-34) = 0.48*10^-19+34 fo= 0.48*10^15 fo= 4.8*10^14Hz 3.0*10^8 = 4.8*10^14*wavel enght wavelenght = 3.0*10^8/ 4.8*10^14 = 0.625*10^-6 wavelenght = 6.25*10^-7 (15dii.) 1/2mV^2 = hf - hfo Kinetic energy = E-Wo E = hc/wavelenght = (6.6 * 10^-34*3.0*10^8 ) / 5.0*10^-7 E = 19.8 *10^-26 / 5.0*10^-7 E = 3.96 * 10-19J Kinetic energy = 3.96* 10^-19 - 3.2*10^-19J = 0.76* 10^-19J =7.6 *10^-20J
Posted on: Thu, 12 Sep 2013 14:36:08 +0000
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