লেজার (LASER) এর পূর্ণরূপ কী?

• ক Light Application by Stimulated Emission of Radiation
• খ Light Amplification by Stimulated Emission of Radiation ✅ সঠিক উত্তর
• গ Laser Amplification by Spontaneous Emission of Radiation
• ঘ Light Access by Stimulated Emission of Radiation