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As shown in the figure ,a combinattion o...

As shown in the figure ,a combinattion of thin plno concave lens and a thin plano convex lens is used to image an object placed at infinity. The radiusof curvature of both the lenses is 30cm and refraction index of the material for both the lenses is 1.75 both lenses are placed at distance of 40 cm from each other. Due to the combination,the image of the image of the object is fromed at distance x=____cm, from concave lens.

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