Sir Winston Churchill High SchoolPHYSICS 30Assignment 13. ALL ANSWERS C0RRECT-GRADED A

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ASSIGNMENT 13 Part One: Blackbody Radiation and the Quantum Part One of this assignment is worth 27 marks. The value of each question is noted in parentheses in the left margin. Note: The answer ar... eas will expand to fit the length of your response. (3) 1. Describe the pattern of intensity vs wavelength observed in blackbody experiments and explain why these observations were in conflict with the prediction of classical physics. Answer: Classical physics predicts that as an object heats up, its intensity of light emitted should increase and its wavelength of emitted radiation would decrease. However, (2) 2. What is the frequency of a 13.0 eV photon? Answer: Ek= 13.0 eV h= 4.14 x10-15 eVs E=hf f =E h f = 13.0 eV 4.14 x10−15eVs f =¿ 3.14x1015 Hz (2) 3. What is the wavelength of a 4.30 x 10-19 J photon? Answer: Ek= 4.30x10-19J h= 6.63 × 10-34 Js E=hc λ λ=hc E λ= (6.63 x10−34 Js)(3.00 x108 m s ) 4.30 x10−19 J λ=¿ 4.63x10-6m (4) 4. How many photons with a wavelength of 532 nm are released each second by a 5.0 mW laser?Physics 30: Assignment 13 2 [Show More]

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