एक आपतित किरण एक समतल दर्पण की सतह के साथ 30° का कोण बनाती है। परावर्तन कोण कितना होगा?

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?