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DAILY NEWS ANALYSIS
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17 May, 2020
2 Min Read
Light-fidelity (LiFi) is a technology used for free-space communication using visible and near-visible light. It is similar to Wireless Fidelity (WiFi), a technology for wireless local area network communication using microwaves. Microwaves can pass through walls while transmitting signals whereas visible and near-visible light cannot pass through walls. Thus it makes LiFi signal network more secure.
Scientists have recently added a new layer of security to LiFi. Light bounces off from walls and falls on the receiver. So wall boundaries can be used effectively for reflecting signals so that communication is maintained even without line-of-sight communication between the signal source and receiver. Receiving detectors can receive both direct and reflected signals.
Walls painted with fluorescent and phosphorescent paints absorb and then emit light with marginal loss. The paints continue to emit light even several hours after the original source of light has been switched off. This makes the communication signal more effective and secure.
Source: TH
03 Dec, 25
On 1st November, eight Indian states—Andhra Pradesh, Chhattisgarh, Haryana, Karnataka, Kerala, Madhya Pradesh, Punjab, and Tamil Nadu—along with five Union Territories—Andaman and Nicobar Islands, Chandigarh, Delhi, Lakshadweep, and Puducherry—celebrate their Formation Day. This date marks an important milestone in India
02 Dec, 25
The Turtle Wildlife Sanctuary, also known as the Kachhua Sanctuary, is located in the Varanasi district of Uttar Pradesh. It is recognised as India’s first freshwater turtle wildlife sanctuary, established to conserve endangered turtle species and support the ecological health of the Ganga River. Location and Extent The sanctuary co
02 Dec, 25
The Ministry of Education plans to introduce Artificial Intelligence (AI) and Computational Thinking (CT) from Class 3 onwards in the 2026–27 academic year. This initiative is part of the National Curriculum Framework for School Education (NCF-SE) 2023 and aligns with the National Education Policy (NEP) 2020. The aim is to prepare student
02 Dec, 25
Scientists from the Environment Department of Himachal Pradesh University (HPU) in Shimla have recently revealed that the Sal tree (Shorea robusta) is the most effective natural air purifier for combating rising pollution levels. Their findings highlight the tree’s superior capacity to trap dust, absorb gases, and cleanse the air compared
02 Dec, 25
The President of the United States has ordered the resumption of nuclear weapon testing after a gap of 33 years, the last test being in 1992. This decision marks a significant shift in global nuclear policy and has far-reaching implications for geopolitics, the environment, and international security. Status of Global Nuclear Weapon Testing
03 Dec,2025
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