दो प्रकाश स्रोतों को कला-संबद्ध (coherent) कहा जाता है यदि वे ऐसी तरंगें उत्पन्न करते हैं:

The Dandi March, also known as the Salt Satyagraha, was led by which influential leader?

Which act formally granted independence to India, marking the end of British rule?

Who was the key figure in establishing the Indian National Congress?