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69. A concave mirror if focal length 100cm is used to obtain the image of sun which subtends an angle 30'. The diameter of the image of sun. A. 1.74. B. 0.87 C. 0.435 D. 100

Answer» 69. A concave mirror if focal length 100cm is used to obtain the image of sun which subtends an angle 30'. The diameter of the image of sun. A. 1.74. B. 0.87 C. 0.435 D. 100


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