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Grade 10Wave Optics

Find the diameter of the moon which forms a image on concave mirror of radius of curvature 4.8meter and the diameter of the image is 2.2cm.The distance between the mirror and the moon is 240000km

Profile image of Padum Nath
8 Years agoGrade 10
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1 Answer

Profile image of Nitish Shukla
8 Years ago
2R=ff=2.4Assuming u to be infinity and applying mirror formula. 1/2.4=1/v+1/∞v=2.4I/O=v/uO=Iu/vI=2.2*10^-2, u=2.4*10^5, v=2.4*10^-2O=2.2*10^5