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Q. |
The strongest pumping bands is a four level system of Nd: YAG laser at wavelength of range_________________ |
A. | 0.25 and 0.56 nm |
B. | 0.75 and 0.81 nm |
C. | 0.12 and 0.23 nm |
D. | 1 and 2 nm |
Answer» B. 0.75 and 0.81 nm |
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