Science in my way

Link to the video- https://youtu.be/9jEFo2CQga4 Have you ever noticed while driving in the highway, the road far ahead seem to have a wet surface? even the cars at that distance also shimmer. Moreover, when you approach closer to the seemingly wet surface, it disappears slowly. This phenomenon is nothing but the effects of refraction of light. The heat is responsible for the shimmering heat waves and it makes the distant cars look wavy. Refraction of light takes place when travelling light is bent due to change in medium. In this case, the light coming from the distant car travels through various regions of air till it reaches our eyes.  The various regions of air has different temperature and light bending abilities depending on how hot each section of the road happens to be. A particular light ray coming to our eyes will have different path than another light ray due to change in their paths. Now, when it reaches our eyes the brain traces each bend light rays directly st...

Link to the video: https://youtu.be/22oNHkr7M7U What is a salt? For some of you it is obviously the one and only common table salt sodium chloride, without which our snacks are incomplete. infact there are different types of salt in our planet. A salt basically is a positively charged part and negatively charged part bound together. The positively charged part is known as cation and the negatively charged part is known as anion, both are essentially ions. In case of sodium chloride the positive ion is sodium whereas the negative ion is chloride. for other salts any metallic ion can take place as the positive ion and non metallic ions for the negative ions. But that is not we are interested in, the question is how do they concentrate the oceans? What happens is a lot of water is evaporated every year and put back on the surface in the form of rain and snow. Some rainfall takes place on the ocean and some takes place on the land, its the land rainfall which makes the ocean sal...