R Ram Sharma 🎓 Coach ⭐ 193.88K Points 📊 Physics Q. What are three types of lasers? (A) Gas, metal vapour, rock (B) Diode, inverted, pointer (C) Pointer, diode, CD (D) Gas, solid state, diode 👁️ Show Answer 🔗 Share ⚡Menu ✅ Correct Answer: (D) Gas, solid state, diode You must be Logged in to update hint/solution 💬 Discussion 💬 Comment