Part A Express your answer using two significant figures. _______ Part B What are its characteristics? Check all that apply. Part B What are its characteristics? Check all that apply. Part B What are its characteristics? Check all that apply. Part B What are its characteristics? Check all that apply. Part C What is its magnification? Express your answer using two significant figures. Part C What is its magnification? Express your answer using two significant figures. Part C What is its magnification? Express your answer using two significant figures. Part C What is its magnification? Express your answer using two significant figures. = _______
Explanation / Answer
Given Focal lengths of the two lenses L1 and L2 are f1 = 28cm and f2 = 19cm Lenses are seperated by a distance , d = 70 cm Object distance of L1 is ,do = 41 cm A) First we , will calculate the overall focal length 1/ F = 1/ f1 + 1/ f2 - d / f1 f2 = 1/ 28cm + 1/19 cm - 70 cm / 28cm (19cm) F = -23.13 cm The final image distance relative to L2 is 1/d12 = 1/F - 1/p1 = - 1/ 23.13 cm - 1/ 41cm d12 = -14.78 cm b) Since the image distance is negative , it is a virtual image c) Magnification, M = - di / do = - (- 14.78 cm) / 41 cm M = + 0.36 The magnification is positive , it is a upright image