एक अवतल दर्पण अपने सामने 15 सेमी की दूरी पर रखी वस्तु का 2 गुना आवर्धित वास्तविक प्रतिबिंब बनाता है। दर्पण के सामने कितनी दूरी पर प्रतिबिंब स्थित है?

The 'Drain of Wealth' theory was propounded by which Indian nationalist leader?

Which event is considered the turning point in Mahatma Gandhi's leadership in the Indian independence movement?

Which African leader is known for his non-violent opposition to colonial rule?