Answer: the focal length of the CCl4-glass combination is 102.31 cm
Explanation:
Given that;
Index of refraction n1 = 1.55
carbon tetrachloride (CCl4), which has n2 = 1.46
radii of curvature for its surfaces R1 = 4.6cm and R2 = 9.20 cm
the focal length of the CCl4-glass combination = ?
we can determine the focal length using the Formula;
1/f = ( n1 - n2) ( 1/R1 - 1/R)
so we substitute in our values
1/f = ( 1.55 - 1.46 ( 1/4.6 - 1/9.20)
1/f = 0.09 × 0.1086
1/f = 0.009774
f = 1 / 0.009774
f = 102.31 cm
Therefore the focal length of the CCl4-glass combination is 102.31 cm
