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WORKSHEET Ah Electromagnetic radiation The following diagram shows the energy density versus wavelength curves for black-body radiation at various temperatures. A black body is a good absorber of clectromagnetic radiation, and all of the light radiated by it originates from the body itself (to reach thermal equilibrium); none is reflected. Energy density versus wavelength for different temperatures ~F=5500,K. 80D: 600: — (arbitrary units) uv w z = x | 2007 le . | 500 te00 1500 2000 Wavelength (nm) 1 Use Wien’s displacement law to calculate the expected peak wavelength for: a 3500K b 4500K e 5500K 2 Our Sun has a surface temperature of 5777 K. Calculate the peak wavelength of the Sun and describe what sort of light this is. Copyright © Pea-son Australia 2019 SBN 978 1 4886 23205 Unit 1 Arpa of Study 1: How can thermal effects be explained? 11 
