‘LASER’ এর পূর্ণরূপ কি? (মে.ভ.প. ১৯-২০)
- কLight Amplification by Stimulated Emission of Electromagnetic Radiation
- খLight Amplification by Stimulated Emission of Radiation
- গLight Augment by Stimulated Emission of Radiation
- ঘLight Amplification by Stimulated Emission of Rays
✅ সঠিক উত্তর: খ. Light Amplification by Stimulated Emission of Radiation