रात्रि में देखने वाले (नाइट विज़न) उपकरणों में मुख्य रूप से किन विद्युत चुंबकीय तरंगों का उपयोग किया जाता है?

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?