1. 7.02 reflection in plane mirrors (1)
7. Rays and waves
7.02 reflection in plane mirrors (1)

2. 7.02 light rays and waves

3. 7.02 Reflection in plane mirrors
When a ray of light is incident on a material like mirror, it undergoes reflection. The incoming ray is incident ray, the outgoing ray is the reflected ray and the line at right- angles to the mirror’s surface is called a normal. The angle between the incident ray and the normal is called the angle of incidence. The angle between the reflected ray and the normal is called the angle of reflection.

4. 7.02 Reflection in plane mirrors
Laws of reflection:
The angle of incidence is equal to angle of reflection.
The incident ray, the reflected ray and the normal all lie in the same plane.

5. 7.02 Reflection in plane mirrors

6. 7.02 Reflection in plane mirrors
Rules for image size and position:
The size of the image is same as that of the object.
The image is as far behind the mirror as the object is in front.
A line joining equivalent points on the object and the image passes through the mirror at right angles.
Note: The image is laterally inverted and virtual

7. 7.02 Reflection in plane mirrors

8. 7.02 Reflection in plane mirrors
Real and virtual images:
For a real image light rays actually converge at a point to form the image.
for a virtual image, the rays appear to converge. E.g. image in a plane mirror.