@ -186,31 +186,39 @@ Sont proposées les catégories suivantes, mais à débattre :
! </details>
! <detailsmarkdown=1>
! <summary>
! How do you characterize each of the single optical elements that make up this optical system, and their relative distances?
! How do you characterize each of the single optical elements that make up this optical system,
! and their relative distances?
! </summary>
!
! * The optical axis is oriented positively in the direction of light propagation (from the painting towards the lensball).
! * The optical axis is oriented positively in the direction of light propagation
! (from the painting towards the lensball).
!
! * The first spherical refracting surface $`DS1`$ encountered by the light has the follwing characteristics :<br>
! * The first spherical refracting surface $`DS1`$ encountered by the light has
! the follwing characteristics :<br>
! $`\overline{S_1C_1}=+|R|=+5\;cm`$ , $`n_{ini}=1`$ and $`n_{fin}=1.5`$
!
! * The second spherical refracting surface $DS2$ encountered by the light has the follwing characteristics :<br>
! $`\overline{S_2C_2}=-|R|=-5\;cm`$ , $`n_{ini}=1.5`$ and $`n_{fin}=1`$
!
! * Algebraic distance between $DS1$ and $DS2$ is : $`\overline{S_1S_2}=+10\;cm`$
!
! </details>
! <detailsmarkdown=1>
! <summary>
! If you had to determine the characteristics of the image (position, size), how would you handle the problem?
!
! If you had to determine the characteristics of the image (position, size), how
! would you handle the problem?
! </summary>
! * $`DS1`$ gives an image $`B_1`$ of an object $`B`$. This image $`B_1`$ for $`DS1`$ becomes the object for $`DS2`$. $`DS2`$ gives an image $`B'1`$ of the object $`B_1`$
!
! * $`DS1`$ gives an image $`B_1`$ of an object $`B`$. This image $`B_1`$ for $`DS1`$
! becomes the object for $`DS2`$. $`DS2`$ gives an image $`B'1`$ of the object $`B_1`$
!
! </details>
! </details>
! <!--FOR IMAGES 2 & 3-->
!
! <detailsmarkdown=1>
! <summary>
!
! Ready to answer M3P2 team questions for images 2 and 3?
! </summary>
!
@ -218,35 +226,59 @@ Sont proposées les catégories suivantes, mais à débattre :
! <summary>
! Where is the painting located?
! </summary>
!
! * The painting is located on the same side of the lens as you, behind you.
!
! </details>
! <detailsmarkdown=1>
! <summary>
! What are the two optical systems at the origin of the two images of the painting? And can you characterize each of the single optical elements (+ their relative distances) that make up each of these optical systems ?
!
! What are the two optical systems at the origin of the two images of the painting? And
! can you characterize each of the single optical elements (+ their relative distances)
! that make up each of these optical systems ?
! </summary>
! * A first optical system $`OS1`$ is composed of a simple convexe spherical mirror (the object is reflected on the front face of the ball lensball). Keaping the ioptical axis positively oriented in the direction of the incident light propagation on the lensball, the algebraic value of the mirror radius is : $`\overline{SC}=+5\;c`$.
!
! * A first optical system $`OS1`$ is composed of a simple convexe spherical mirror
! (the object is reflected on the front face of the ball lensball). Keaping the optical
! axis positively oriented in the direction of the incident light propagation on the lensball,
! the algebraic value of the mirror radius is : $`\overline{SC}=+5\;c`$.
!
! * The second optical system $`OS2`$ is composed of three simple optical elements :<br><br>
! 1) The light crosses a spherical refracting surface $`DS1`$ with characteristics : $`\overline{S_1C_1}=+|R|=+5\;cm`$ , $`n_{ini}=1`$ and $`n_{fin}=1.5`$.
! 1) The light crosses a spherical refracting surface $`DS1`$ with characteristics :
! $`\overline{S_1C_1}=+|R|=+5\;cm`$ , $`n_{ini}=1`$ and $`n_{fin}=1.5`$.
!
! 2) Then the light is reflected at the surface of the last lensball interface that acts like a spherical mirror of characteristics : $`\overline{S_2C_2}=-|R|=-5\;cm`$, $`n=1.5`$.
! 2) Then the light is reflected at the surface of the last lensball interface that
! acts like a spherical mirror of characteristics : $`\overline{S_2C_2}=-|R|=-5\;cm`$,
! $`n=1.5`$.
!
! 3) Finally the light crosses back the first interface of the lensball that acts like a spherical refracting surface those characteristics are : $`\overline{S_3C_3}=+|R|=+5\;cm`$ , $`n_{ini}=1.5$ and $n_{fin}=1`$.
! 3) Finally the light crosses back the first interface of the lensball that acts
! like a spherical refracting surface those characteristics are :
! $`\overline{S_3C_3}=+|R|=+5\;cm`$ , $`n_{ini}=1.5$ and $n_{fin}=1`$.
!
! Relative algebraic distances between the different elements of $`OS2`$ are :
!
! $`\overline{S_1S_2}=+10\;cm`$ and $`\overline{S_2S_3}=-10\;cm`$
!
! </details>
! <detailsmarkdown=1>
! <summary>
! Which image is associated with each of the optical systems?
! </summary>
!
! * It is difficult to be 100% sure before having made the calculations.
!
! </details>
! <detailsmarkdown=1>
! <summary>
! Why do we had to take the picture in the darkness, with only the painting illuminated behind the camera, to obtain images 2 and 3 ?
! Why do we had to take the picture in the darkness, with only the painting
! illuminated behind the camera, to obtain images 2 and 3 ?
! </summary>
! * At a refracting interface, part of the light incident power is refracted, and part is reflected. For transparent material like glass and for visible light, the part of the reflected power is small. If the room had been homogeneously illuminated, the images 2 and 3 of the painting on the wall behind the camera would have been faintly visible compared to the image of the front wall through the lensball.
!
! * At a refracting interface, part of the light incident power is refracted,
! and part is reflected. For transparent material like glass and for visible light,
! the part of the reflected power is small. If the room had been homogeneously
! illuminated, the images 2 and 3 of the painting on the wall behind the camera would
! have been faintly visible compared to the image of the front wall through the lensball.
