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How far should the object be placed from a convex mirror of focal length 40 cm, when the image is to be obtained at a distance of 8 cm from the mirror ? 40 सेमी फोकस दूरी वाले उत्तल दर्पण से वस्तु को कितनी दूरी पर रखा जाए जब प्रतिबिंब दर्पण से 8 सेमी की दूरी पर प्राप्त करना हो?

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How far should the object be placed from a convex mirror of focal length 40 cm, when the image is to be obtained at a distance of 8 cm from the mirror ? 40 सेमी फोकस दूरी वाले उत्तल दर्पण से वस्तु को कितनी दूरी पर रखा जाए जब प्रतिबिंब दर्पण से 8 सेमी की दूरी पर प्राप्त करना हो?






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