R Ram Sharma 🎓 Coach ⭐ 193.88K Points 📊 Physics Q. Red light is used for signals as it has (A) long wavelength (B) high intensity (C) high frequency (D) low refraction in the medium 👁️ Show Answer 🔗 Share ⚡Menu ✅ Correct Answer: (A) long wavelength You must be Logged in to update hint/solution 💬 Discussion 💬 Comment