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.
India is now ranked 38th out of 139 nations in the Logistic Performance Index (LPI) 2023 of the World Bank. From its previous rankings of 44th in 2018 and 54th in 2014, this is a notable improvement. Earlier, the Logistics Ease Across Different States (LEADS) Report 2022 was published by the Ministry of Commerce and Industry. About Logi
Airports discovered more than 63% of this illegal gold. The Department of Revenue Intelligence recently conducted the Golden Dawn Operation across India, seizing 101.7 kg of illegal gold valued at Rs 51 crore. Despite the fact that India receives a legal import of about 800-1,000 tonnes of gold each year, the illicit market is thought to be
Both parties expressed satisfaction with the ongoing bilateral defence cooperation at the 8th India-Thailand Defence Dialogue, which was held in Bangkok, Thailand. Cultural ties and mutual cooperation that have been shaped by thousands of years of lasting historical and cultural ties characterise India and Thailand relations. Highlight
The Kerala government's appeal of the order of the Kerala High Court is rejected by the Supreme Court. The Kerala government's appeal against the Kerala High Court's directive to move Arikomban (Wild Elephant), the "rice tusker" of Munnar, to the Parambikulam tiger reserve was recently dismissed by the Supreme Court.
Global Buddhist Summit In order to improve diplomatic and cultural ties with other nations, the Ministry of Culture recently organised the First Global Buddhist Summit 2023 in collaboration with the International Buddhist Confederation (IBC). About the summit "Responses to Contemporary Challenges: Philosophy to Praxis" is
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