Unit: Light – reflection & refraction (Hindi)
Possible mastery points
We have experience and intuition for flat mirrors. But if we slightly curve these mirrors, a whole new world opens up. In this lesson we will explore the concave and convex mirrors and their applications.
Let's learn how to construct images, when an object is kept in front of curved mirrors, using ray diagrams.
It's possible to address whether a mirror is concave or convex, whether an object is in front or behind the mirror, whether an image is real or virtual, with just positive and negative signs. Let's explore how in this lesson
Let's explore how to use the mirror formula to locate image positions when objects are kept in front of convex and concave mirrors.
You may have seen that a straw, immersed in a glass of water, appears bent. It's actually the light, coming from the straw, that's bent. Light bends when it changes medium. It's a big deal because if it didn't, our eyes wouldn't work. So let's explore this bending of light in this lesson.
In this lesson, we will clarify the difference between absolute & relative refractive index. We will also see how to connect them.
Let's explore how to construct images, when objects are kept in front of a lens, by drawing ray diagrams.
Given the object location and focal length of a lens, let's figure out exactly where the image would be. We will be deriving the lens formula & magnification formula for lenses.
Let's explore how to use the lens formula to figure out where images are and how big they get when some objects are kept in front of lenses.