Hi, there is a parameter sigma which should be equal to 5.67*10**(-8) in my programming. When the code is like this
sigma= 5.67*10**(-8)
L=0.1 !m
a=1.0
e=1.0
ua=2000.0 !K
dx=L/21.0
t=sigma*dx*(a*ua**4-e*298.0**4)
print*, t
the results is t=0.00000000
However, when the code is like this
sigma= 0.0000000567
L=0.1 !m
a=1.0
e=1.0
ua=2000.0 !K
dx=L/21.0
t=sigma*dx*(a*ua**4-e*298.0**4)
print*, t
I get the exact result that t=4317.871
I don't know why I got two different results because of the sigma function. Could you tell me why?