Working principle of LEDs and why they are made from semiconductors. A quick guide on semiconductors and how doping can change them. More discussion here- http://devender-maun.blogspot.com/2015/03/how-leds-work-and-short-guide-on.html

Discussion on how do solar cells work? Why semiconductors are used in solar cells and explanation of photoelectric effect? For more details and schematics check this link: http://devender-maun.blogspot.com/

Reason behind lightning strikes and some fun facts on thunderstorms. 

Discussion on why various objects have different color and fundamental mechanisms by which colors are produced. We discuss Rayleigh scattering, electronic transitions and concepts of absorption and reflection.

Discussion on how the Universe was created. A short guide on the Big Bang Theory also. Check this for details- http://devender-maun.blogspot.com/

A short guide on what constitute matter. A quick summary of subatomic particles. For more details check this- http://devender-maun.blogspot.com/

Discussion on why do we feel the heat of the sun. For more details check this- http://devender-maun.blogspot.com/

Discussion on how is heat conducted and why metals are good conductor of heat.

Understanding why metals conduct electricity whereas ceramics/dielectric do not.

Trying to understand difference between metals and ceramics in terms of bonding.