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categoryالفيزياء
schoolبكالوريوس
event_available2026-07-15
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mum2 Documents MATLAB
wwe Editor D:\Users\gividaurri2\Downloads Lab1 1.mlx"
ab1 1.mix Xx+
Planck's law describes the electromagnetic radiation emitted from a black body at temperature specified in Kelvin. A black body is an object that absorbs
incident radiation across all wavelengths (thus it is called a black body) and emits thermal radiation across a continuous frequency spectrum based on the
object's temperature. Planck's law is:
2πc²h
R(A,T) = 25
1
(hc)/(AKT) -
Where is the wavelength in meters, c = 3 x 10^8 meter/second is speed of light, h = 6.63 x 10^-34 Joule-second is Planck's constant, and k = 1.38 x
10-23 Joule/Kelvin is Boltzman's constant
Task 1
X Using Planck's law, write a MATLAB script to plot the spectral radiance of a black body at T-5700 degrees
x Celsius from 0 to 2000 nanometers (ns). Label the x-axis, y-axis, and the title of your plot correctly with
x units. (xlabel(), ylabel(), title()) Hint: "avec [0:2:100]" is a one-dimensional vector from 0 to 100
Xat intervals of 2. e is the starting point, 100 is the end point, and 2 is the step size.
c- 310^8;
I
h
6.63 10^(-34);
k
1.38 10^(-23);
T - 5700;
Xsetting known values to variablesx
Xmaking the wavelength natrix array%
Llinspace(110(-6),2000 * 10^(-6),5);
(2 picch)/ (L. (5))) .
plot(L,R)
xlabel('Wavelength (mm)');
e
R=
1
2
3
4
ylabel('Spectral Irradiance (W/m^2/nm)');
title (Solar Radiation Spectrum');
(1 / (log(h c./Lk T)-1)) ; x Spectral Raddiance equations
Xplot to title label the graph
mmand Window
w to MATLAB? See resources for Getting Started
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