Minds Of Aspirants (Official)

Green bonds - please note this question down for prelims - this is a highly probable question What is green bond and what are its features?

#gs3 #internalsecurity What are the various usage of drones? What is the work of BSF? Which border does BSF protect ? Can you draw a map of protection of BSF?

#MOA_Gazette #Prelims 2023 1.Liberalised drone rules 2021 2.Where is Indias first drone station? 3. What is SVAMITVA scheme? #Mains 2023 (GS 3) Application of technology in the governance process e-technology aiding agriculture Can drone pilots can address employment issues in the future?

Prelims'26 Mains'25 Akashteer air defence control system Bhargavastra DRDO's anti drone system Indrajaal

✅ Electromagnetic Waves Used in Common Technologies Bluetooth • Uses Microwaves (2.4 GHz) • Short-range wireless communication. TV Remote • Uses Infrared (IR) waves • Line-of-sight control. Communication Satellites • Use Microwaves (C-band, Ku-band, Ka-band) • Least atmospheric absorption → clear long-distance communication. James Webb Space Telescope (JWST) • Uses Infrared (IR) for observation • Sees through dust clouds; detects early universe. Drones • Controlled using Radio waves / Microwaves (2.4–5.8 GHz) • Reliable high-bandwidth control signals. WiFi • Uses Microwaves (2.4 GHz & 5 GHz) • Wireless internet transmission. MRI Scan • Uses Radio waves (RF waves) + Magnetic field • Radio waves excite hydrogen nuclei → imaging. LASER • Uses Coherent light (Visible or Infrared) • Highly focused → cutting, medical, defence, measurement. Remote Sensing Satellites • Use Visible light, Infrared, Microwave Visible → land use, vegetation IR → heat, moisture Microwave → cloud-penetration, all-weather data Optical Fibres • Use Infrared light (850, 1310, 1550 nm) • Lowest signal loss → high-speed internet. Radar • Uses Microwaves (1–10 GHz) • Aircraft tracking, weather radar, speed guns. LiDAR • Uses Laser pulses (Near-IR) • 3D mapping, elevation survey, autonomous vehicles. Night Vision Devices • Use Infrared (Near-IR / Thermal IR) • Detects heat OR uses IR illumination in darkness.

#prelims2022 What are the rare earth metals used in electronic goods

A good article explaining how rare earth elements are useful in each industry and what is the issue

90% global lithium concentrated Chile Argentina Bolivia Australia China Cobalt and nickel - Congo and indonesia

China restricted exports Samarium Gadolinium Terbium Dysprosium Lutetium Scandium Yttrium Gallium Germanium Antimony

Mains'25 Gs2 Ban on rare earth magnets export by china Mains candidates to note this down "Neodymium iron boron" magnets Electrict motors Power steering Wiper motors

India- Australia Rare earth minerals Copper

China rare earth elements ban Critical minerals

India - Australia China dominance Rare earth elements ban Clean energy Gs 2