Equation for intensity fo light4/9/2024 ![]() ![]() This factor, he posited, should affect the probability that short wavelength light would be emitted. The discord between the predicted classical theory line and the actual results is known as the ultraviolet catastrophe.ĭue to concerns over the ultraviolet catastrophe, Max Planck began to question whether another factor impacted the relationship between intensity and wavelength. ![]() And within the context of these questions, Max Planck discovered something of tremendous importance.įigure 21.3 The graph above shows the true spectral measurements by a blackbody against those predicted by the classical theory at the time. Why doesn’t a blackbody emit radiation evenly across all wavelengths? Why does the temperature of the body change the peak wavelength that is radiated? Why does an increase in temperature cause the peak wavelength emitted to decrease? It is questions like these that drove significant research at the turn of the twentieth century. While in science it is important to categorize observations, theorizing as to why the observations exist is crucial to scientific advancement. This is verified by the leftward movement of the three red lines as temperature is increased. Because the speed of light is constant, frequency and wavelength are inversely related.
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