Commit db2b7c54 authored by Claude Meny's avatar Claude Meny

Update textbook.fr.md

parent a96c060d
Pipeline #12537 canceled with stage
......@@ -82,20 +82,20 @@ Il sait que si il ne comprends pas un mots, il y a des explications de vocabulai
!!!!!
!!!!! <details markdown=1>
!!!!! <summary>
!!!!!! What is the apparent magnification of the cathedral ?
!!!!! Voir
!!!!! </summary>
!!!!! * Apparent magnification = angular magnification = magnifying power.
!!!!! * une droite :
!!!!!
!!!!! * As calculated previously, standing 400 metres from the cathedral, the 90 m heigh
!!!!! cathedral sustends the apparent angles of $`\alpha=arctan\left(\dfrac{90}{400}\right)=0.221\;rad=12.7°`$
!!!!! at your eye.<br>
!!!!! ![](straight-line_L800.png)
!!!!!
!!!!! ![](graduated-axis_L800.png)<br>
!!!!! * un axe :
!!!!!
!!!!! ![](axis_L800.png)
!!!!!
!!!!! ![](straight-line_L800.png)
!!!!! _Cathedral of Orleans (France)_
!!!!! * un axe gradué :
!!!!!
!!!!! ![](graduated-axis_L800.png)
!!!!!
!!!!! </details>
......
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