We explore how powerful your laser needs to be to get noticed on Mars and beyond. Have you ever played with a pocket-sized laser, wondering how far its light would travel? Could you, a naughty student inside a classroom on Earth, annoy a poor substitute teacher on Mars by waggling your laser pointer at him? The short answer: no. By the time the light finally … Continue reading How Far Can Laser Light Travel?
Knowing a Black Hole Passing away of Prof. Stephan Hawking has once again drawn people’s attention towards Black Holes as the topic was not only very dear to this scientist but he has given many theories on these astronomical mysterious objects. Black holes are among the strangest things in the universe. They are massive objects –collections of mass – with gravity so strong that nothing … Continue reading Knowing a Black Hole
How Plants Protect Themselves Against Diseases? We all know that plants are sedentary and cannot ‘run away’ from adversary caused by both biotic (living organisms such as bacteria, fungi, virus, nematodes) or abiotic (environmental such as moisture or nutrient deficit, temperature, drought, salinity or alkalinity in soil, pollution etc) stresses. They have to stand up to the challenges and face them either by countering them … Continue reading How Plants Protect Themselves Against Diseases?