Question

The energy gap of an element is given as 5.9x10* eV. Calculate the intrinsic coherent
length if Vi = 5.82x10 m/s.
(a) 5.9 cm
(b) 1.2 cm
(c) 9.5 cm
(d) 2.1 um​

Answer 1

Answer:

Given  That:

$Eg$ = 5.9 × $10^{*}$ ev

v = 5.82 × 10 m/s

To find

$E$ = ?

Explanation:

The intrinsic coherent length of an element is given  by

$E_{0}$ = 2hv÷$E_{g}$

$h=h/2\pi$

h represent the planks constant and its

value is 6.62×$10^{-34}$ $m^{2}$kg$/$s

$E_{0}$ $=$ $2hv$$/2\pi E_{g}$

$E_{0}$ $= hv/\pi E_{g}$

$E_{0}$ $=$ 6.62×$10^{-34}$×5.82×10 $/$ 3.14×5.9×10

$E_{0} =$ 38.5284×$10^{-34}$×10 $/$ 18.526×10

$E_{0}$ $=$ 2.0796××$10^{-6}$m

$E_{0} =$ 2.1 μm