Question

प्रयोग | Experiment 1. उत्तल लेंस की सहायता से एक उत्तल दर्पण की फोकस दूरी ज्ञात करें। (चन । Find the focal lengh of a convex mirror using a convex lens​

Answer 1

Answer:

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Answer 2

As a convex mirror generally shapes a virtual picture, its central length can't be found straightforwardly concerning a concave mirror. For this reason, a backhanded strategy is utilized, as portrayed underneath.

• An auxiliary convex focal point L is presented between the convex mirror M and article needle O as displayed in beam graph (a).
• Keeping the article needle at a distance of 1.5 occasions unpleasant central length of a convex focal point, the place of the convex mirror behind the convex focal point is extremely changed that a genuine and altered picture of item needle O, is framed at O itself.
• Under such conditions, the light beams are occurrence regularly over the convex mirror to backtrack their way. Without a trace of the convex mirror, these beams would have met at the focal point of ebb and flow C of the convex mirror.
• The distance PC gives the span of curve R of the mirror.
• To find the place of C, a convex mirror is taken out (without upsetting the article needle O and convex focal point L).
• A picture needle I is put behind the convex focal point and moved to a situation at which there is no parallax between the tip of rearranged picture of the O needle and the tip of the I needle. Position of picture needle I gives position of the focus of bend C of the mirror M beam graph (b)]