Concepts

Class 10
Chapter 10 Class 10 - Light - Reflection and Refraction

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## What is Light?

Light is a form of energy

Light helps us see objects

## What is reflection of light?

When a ray of light strikes a mirror, it is reflected in a different direction

## Laws of Reflection

There are 2 laws of Reflection

• The Incident ray, Reflected ray and the Normal, all lie in the same plane
• The Angle of Incidence is always equal to Angle of Reflection

## Image formed by plane mirror

In a plane mirror, image formed is behind the mirror

It looks like

## Properties of Image formed in Plane Mirror

• Image is formed behind the mirror
• Image is Virtual(Not real) and erect.
• Image formed is of same size
• The image formed is at the same distance behind the mirror as the object is in front of it.

## What do we mean by real and virtual images?

Real images are formed in front of the mirror

Virtual images are formed behind the mirror

Example - Plane mirror forms Virtual image

## What do we mean by erect and inverted image?

Erect image is a straight image

Inverted image is upside down

Example - Plane mirror forms Erect image

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