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1. What prism will deviate a light 8cm at 0.5m?     16pd

2. What prism will deviate a light 2cm at 0.5m?     4pd

3. What prism will deviate a light 2cm at 1m?        2pd

1. How much prism imbalance is created with 2BU OD and 3BD OS?    5pd

2. How much prism imbalance is created with 4BI OD and 4BO OS?       0

3. How much prism imbalace is created with 2BI OD and 2BI OS?          4pd

4. How much prism imbalance is created with 4BD OD and 4BD OS?     0

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