Physics · Light Reflection and Refraction
कार्तीय चिह्न परिपाटी के अनुसार, एक उत्तल दर्पण की फोकस दूरी होती है:
- 1अनंत
- 2शून्य
- 3ऋणात्मक
- 4धनात्मक✓
सही उत्तर देखें
धनात्मक
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