In the figure,the radius of curvature of the curved part of the lens is 24.0 cm,and the refractive index of the lens material is 1.750.What is the focal length of the lens? 
Definitions:
T Value
A statistic used in hypothesis testing to determine if there is a significant difference between two groups.
Test Statistic
A value calculated from sample data that is used in a hypothesis test to determine whether to reject the null hypothesis.
Degrees Of Freedom
The number of independent values or quantities which can be assigned to a statistical distribution or calculation.
Null Hypothesis
A hypothesis stating there is no significant difference or effect, serving as the default assumption in hypothesis testing.
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