Question

The birefringence of a mineral of thickness 30 μm and retardation 0.27 μm is (give answer in three decimal places).

Hint:

Birefringence is calculated by dividing the retardation by the thickness of the mineral.

Answer 1

Correct Answer: 0.009

Step 1: Understanding the question.
The question asks for the birefringence of a mineral, given its thickness and retardation. The formula for birefringence is:
\[ \text{Birefringence} = \frac{\text{Retardation}}{\text{Thickness}} \]
Step 2: Calculation.
Using the given values:
Retardation = 0.27 μm
Thickness = 30 μm
Birefringence = \(\frac{0.27}{30} = 0.009\)
Step 3: Conclusion.
The correct answer is 0.009, which is the birefringence of the mineral.