Question 98 - The Planck-Einstein relation connects the particulate photon energy E with its associated wave frequency f to produce E = hf. Let h to be the Planck constant. The frequency f, wavelength L and speed of light c are related by E = hc / L. With p denoting the linear momentum of a particle, the de Broglie wavelength L of the particle is given by L = h / p. (a) Find the equation of E as a function of p and c. (b) If E has a unit of electron-volt and f has a unit of 1 / second, then what is the unit of h?

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main() { char input[] = "SSSWILTECH111"; int i, c; for ( i=2; (c=input[i])!=''; i++) { switch(c) { case 'a': putchar ('i'); continue; case '1': break; case 1: while (( c = input[++i]) != '1' && c!= ''); case 'E': case 'L': continue; default: putchar(c);continue; } putchar(' '); } putchar(' '); }

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