Class 10 Science — Chapter 9: Light – Reflection and Refraction

What you'll learn

• ▸Laws of Reflection
• ▸Introduction to Spherical Mirrors
• ▸Terminology of Spherical Mirrors
• ▸Principal Focus and Focal Length
• ▸Relationship between Radius of Curvature and Focal Length
• ▸Image Formation by Spherical Mirrors

Chapter Summary

--- PAGE 1 --- CHAPTER 9 Light – Reflection and Refraction 1064CH10 We see a variety of objects in the world around us. However, we are unable to see anything in a dark room. On lighting up the room, things become visible. What makes things visible? During the day, the sunlight helps us to see objects. An object reflects light that falls on it. This reflected light, when received by our eyes, enables us to see things. We are able to see through a transparent medium as light is transmitted through it. There are a number of common wonderful phenomena associated with light such as image formation by mirrors, the twinkling of stars, the beautiful colours of a rainbow, bending of light by a medium and so on. A study of the properties of light helps us to explore them. By observing the common optical phenomena around us, we may conclude that light seems to travel in straight lines. The fact that a small source of light casts a sharp shadow of an opaque object points to this straight-line …

Practice Questions from this Chapter

Tap "Get Solution" on any question to ask our AI tutor.

1. Explain how rainbows form. Get Solution →
2. Demonstrate light bending examples. Get Solution →
3. Compare concave and convex mirrors. Get Solution →
4. According to the laws of reflection, the angle of incidence is always equal to what? Get Solution →
5. What type of image is always formed by a plane mirror? Get Solution →
6. A spherical mirror whose reflecting surface is curved inwards is called what? Get Solution →
7. What is the center of the reflecting surface of a spherical mirror called? Get Solution →
8. The straight line passing through the pole and the centre of curvature of a spherical mirror is known as the what? Get Solution →

Did you know?

• 💡 Light from the Sun takes about 8 minutes and 20 seconds to reach Earth.
• 💡 A light-year is the distance light travels in one year, roughly 9.46 trillion kilometers.
• 💡 Some animals, like cats, have a special reflective layer behind their retina, enhancing night vision.
• 💡 Ancient Egyptians used polished copper and bronze to make the first mirrors.
• 💡 Mirrors can be used to create optical illusions, making things appear where they aren't.

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