Teaching CG TET Paper 1 & 2 Mock Test 2024 General Science Physics Optics

यदि किसी अवतल दर्पण पर आपतन कोण 30° हो, तो परावर्तन कोण का मान क्या होगा?

1
15°
2
30°
3
90°
4
60°
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