Table 3. Experimental and theoretical Δ2θ due to refraction in an LaB6 film.
| Incidence angle (°) | α = 0.2 | α = 0.1 |
| Experimental shift (°) | 0.03841 | 0.07142 |
| Theoretical shift (°) | 0.03488 | 0.06909 |
| Relative error (%) | 9.19 | 3.27 |
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