Spherical mirror has two types – Concave mirror and Convex mirror. In this article, we’re going to discuss the focal length of a concave mirror. Though, the focal length of both types of mirrors has the same definition and units, but the signs of focal length are different for these two mirrors. Here, we have … Read more
In another article, we discussed the refractive index of a material and most of the facts related to refractive index. The value of the index of refraction is different for different materials. So, it is better to a rule to calculate the refractive index of different materials. In this article, we’re going to discuss how … Read more
If you emerge a straight pencil into a glass of water, you can see the part of the pencil inside the water is bent. The pencil does not bend. It appears to be bent because the light bends while passing from one medium to another medium. Now, the question is, why does light bend when … Read more