| Q.21 | The visible light can have the wave length between……………. | |
| Ans | 1. 8000 Ao | |
| 2. 7000 Ao and 7500 Ao | ||
| 3. 4000 Ao and 7000 Ao | ||
| 4. 7000 Ao |
Correct Ans Provided: 3
Date: 19/10/2021 Shift: Q. No: 71
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