A tank Contains a slab of glass 8cm thick and refractive Index 1.16. Above this is a depth of 4.5cm of water and upon this floats 6cm of water of refractive Index of 4/3. To an observer looking down from above, what the apparent position of a mark on the bottom of the tank?

• Safu ya kioo: $t_g = 8 \text{ cm}$, $n_g = 1.5$
• Safu ya kimiminika: $t_l = 4.5 \text{ cm}$, $n_l = 1.5$
• Safu ya maji: $t_w = 6 \text{ cm}$, $n_w = \frac{4}{3}$

Kina kinachoonekana jumla ($d_{total\_app}$) ni jumla ya kina kinachoonekana cha kila safu:

Kina kinachoonekana cha alama ni $\boxed{12.83 \text{ cm}}$.

• Safu ya maji (juu): $t_w = 4 \text{ cm}$, $n_w = 1.33$
• Safu ya kioo (chini): $t_g = 6 \text{ cm}$, $n_g = 1.5$

Kina kinachoonekana jumla ($d_{total\_app}$) ni jumla ya kina kinachoonekana cha kila safu:

Kina kinachoonekana cha kitu ni $\boxed{7.01 \text{ cm}}$.

• Slabu ya 1 (chini): $t_1 = 1.2 \text{ cm}$, $n_1 = 1.4$
• Slabu ya 2 (kati): $t_2 = 1.8 \text{ cm}$, $n_2 = 1.5$
• Slabu ya 3 (juu): $t_3 = 0.8 \text{ cm}$, $n_3 = 1.6$

Kina kinachoonekana jumla ($d_{total\_app}$) ni jumla ya kina kinachoonekana cha kila slabu:

Alama iliyo kwenye meza itaonekana kuwa kwenye kina cha $\boxed{2.56 \text{ cm}}$.

3 zimekamilika, zimebaki 2 leo. Unapiga hatua.