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Diffstat (limited to '1271/CH14/EX14.21/example14_21.sce')
| -rwxr-xr-x | 1271/CH14/EX14.21/example14_21.sce | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/1271/CH14/EX14.21/example14_21.sce b/1271/CH14/EX14.21/example14_21.sce new file mode 100755 index 000000000..cd6f243a9 --- /dev/null +++ b/1271/CH14/EX14.21/example14_21.sce @@ -0,0 +1,20 @@ +clc +// Given that +lambda = 3.5e-7 // wavelength of light in meter +i = 1 // intensity in W/m^2 +p = 0.5 // percent of incident photon produce electron +a = 1 // surface area of potassium in cm^2 +w = 2.1 // work function of potassium in eV +h = 6.62e-34 // Planck constant in J-sec +c = 3e8 // speed of light in m/sec +e = 1.6e-19 // charge on an electron in C +m = 9.1e-31 // mass of an electron in kg +// Sample Problem 21 on page no. 14.28 +printf("\n # PROBLEM 21 # \n") +printf("Standard formula used \n ") +printf(" 1/2*m*v^2 = (h * c)/ lambda\n") +E = (((h * c) / lambda) * (1 / e) - w) * e +E_ = (p * a * 1e-4) / 100 // in W/cm^2 +n = E_ / E +printf("\n Maximum kinetic energy is %e J.\n Number of electrons emitted per sec from 1cm^2 area is %e .",E,n) + |