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Draw a ray diagram to show the image formation by a concave mirror when the object is kept between its focus and the pole. Using this diagram, derive the magnification formula for the image formed. |
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Answer» Solution :RAY diagram, showing the image formation by a concave mirror when the object AB is KEPT between its focus F and the pole P, is given in Fig. 9.33. The image A.B. is a virtual, erect and magnified image. CONSIDER `DeltaABP`and `triangleA.B.P`. Obviously, the triangles are SIMILAR triangles. Hence, we have PB `=-u` `PB. =+v, AB =h` and `A.B. =h.` `THEREFORE h^(.)/h=(+v)/(-u)` `therefore` Linear magnification of image formed `mh^(.)/h =-v/u` 
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