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- higher emission efficiency
- no tuning arrangement
- narrow spectral width
- provision for confinement
As compared to LED, LASER has
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A. | 1, 2, 3 are correct [Wrong Answer] |
B. | 1, 2, 4 are correct [Wrong Answer] |
C. | 1 and 3 are correct [Wrong Answer] |
D. | 1, 3, 4 are correct [Correct Answer] |