ما الفرق بين "طلعت الشمس" و"أشرقت الشمس" ولماذا استُخدمت كل عبارة في آية مختلفة من سورة الكهف؟

The phrase "أشرقت الشمس" (the sun rose brightly) is not mentioned in Surat Al-Kahf. What is stated therein is: "And you would have seen the sun, when it rose, inclining away from their cave to the right, and when it set, passing away from them to the left, while they were in a wide opening thereof." The linguistic difference is that "طلوع الشمس" (the rising of the sun) means its appearance, whereas "الشروق" (sunrise/shining brightly) means the appearance of its light upon the earth.