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In a laboratory four convex lenses L1, L2, L3 and L4 of focal lengths 2, 4, 6 and 8 cm respectively are available. Two of these lenses form a telescope of length
![A first course in projective geometry . Fig. 916. It appears that an ellipse always has a real director circle;a hyperbola only when AC > BC. In the rectangular hyperbola AC = A first course in projective geometry . Fig. 916. It appears that an ellipse always has a real director circle;a hyperbola only when AC > BC. In the rectangular hyperbola AC =](https://c8.alamy.com/comp/2AXGNDB/a-first-course-in-projective-geometry-fig-916-it-appears-that-an-ellipse-always-has-a-real-director-circlea-hyperbola-only-when-ac-gt-bc-in-the-rectangular-hyperbola-ac-=-bc-and-the-directorcircle-becomes-a-point-circle-at-the-centre-of-the-curve-in-the-parabola-the-circle-has-an-infinite-radius-and-thusbecomes-a-straight-line-it-is-easily-shown-that-this-line-is-the-directrix-for-iftp-tp-are-the-tangents-sy-sy-the-focal-perpendiculars-onthem-y-and-y-lie-on-the-tangent-at-the-vertex-fig-92-but-syty-is-a-rectangle-and-st-is-bisected-by-yy-t-musttherefore-lie-on-a-line-para-2AXGNDB.jpg)
A first course in projective geometry . Fig. 916. It appears that an ellipse always has a real director circle;a hyperbola only when AC > BC. In the rectangular hyperbola AC =
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A card sheet divided into square each of size 1 mm^2 is being viewed at a distance of 9 cm through a magnifying glass (a converging lens of focal length 10 cm )
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The suitable focal length of the convex lens used as magnifying lens to read hallmark 916 written on - Brainly.in
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The focal length of a convex lens is 10 cm. The magnifying powers when it is used as a magnifying glass to form the image at (i) near point and (ii) far
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