| CLASS | 6TH |
| SUBJECT | SCIENCE |
| CHAPTER 8 | Light Shadow and Reflection |
| BOARD | CBSE |
| MEDIUM | ENGLISH |
Keywords
Luminous: the objects that have light of their own are called luminous objects.
Non-luminous: the objects that do not have light of their own are called non-luminous objects.
Shadow: dark areas formed by the absence of light are called shadows.
Solar eclipse: the situation in which we are not able to see the sun on a clear cloudless day is called a solar eclipse.
Lunar eclipse: the situation in which we are not able to see the sun on a clear cloudless day is called a lunar eclipse.
Pinhole camera: a dark box with a small hole on one side and a translucent screen on the other side, is called a pinhole camera.
Mirror: a plain glass with a silver polish on one side is called a mirror.
Periscope: a device used to keep an eye on the movement of enemies that are not directly in the line of observation is called a periscope.
- Light is a form of energy that produces the sensation of sight in our eyes.
- There are many natural and artificial sources of light.
- Objects can be divided into transparent, translucent and opaque objects.
- Light always travels in a straight line.
- Shadow is formed whenever the path of light is obstructed by an opaque object.
- A screen is needed to form a shadow.
- Solar and lunar eclipses also happen in the formation of shadows.
- A pinhole camera is based on the property of light travelling in a straight line.
- A mirror is a plain glass with a silver polish on one side.
- Reflection of light causes the formation of images.
- A periscope uses the principle of reflection of light by two-facing mirrors.