|
Reflection
Card 1: State the 2 laws of reflection
Laws of Reflection
- The angle of incidence is equal to the angle of reflection.
- The incident ray, the reflected ray and the normal all lie in the same plane.
Card 2: What is meant by a real image?
Card 3: Define virtual image.
Card 4: State the characteristic of the image formed by a plane mirror.
Characteristic of the Image Form by a Plane Mirror
- Virtual
- Upright
- Same size
- Laterally inverted
- Image distance = object distance
Card 5: Curve Mirror - Technical Terms
Curve Mirror
| Centre of curvature, C | The geometric centre of a hollow sphere of which the concave or convex mirror is a part. |
| Pole of mirror, P | The centre point on the curved mirror. |
| Radius of curvature, r | Distance between the pole, P and the centre of curvature, C. |
| Principal focus, F | A point through which all rays traveling parallel to the principal axis converge to or appear to diverge from after reflection by the mirror. |
| Focal length, f | The distance between the principal focus, F and the pole of the curved mirror, P. |
| Aperture of mirror | The portion of the surface of the mirror that reflects light. |
| Object distance, u | Distance of object from the pole of the mirror, P. |
| Image distance, v | Distance of image from the pole of the mirror, |
| Principal axis | A line which passes through the centre of curvature, C and the pole of a curved mirror, P. |
Card 6: Rules in drawing ray diagram 1
Rules in Drawing Ray Diagram 1
Concave Mirror |
Convex Mirror |
 |
 |
| The ray of light through C. This is reflected back through C. | A ray towards C is reflected back along its own path. |
Card 7: Rules in Drawing Ray Diagram 2
Rules in Drawing Ray Diagram 2
Concave Mirror |
Convex Mirror |
 |
 |
| The ray of light parallel to the principal axis. This is reflected through F. | A ray parallel to the principal axis is reflected as if it came from F. |
Card 8: Rules in Drawing Ray Diagram 3
Rules in Drawing Ray Diagram3
Concave Mirror |
Convex Mirror |
 |
 |
| The ray of light through F. This is reflected parallel to the principal axis. | A ray towards F is reflected parallel to the principal axis. |
Card 9: Charecteristic of image form by a concave mirror
Card 10: Charecteristic of Image Form by a Convex Mirror
Card 11: Application of Plane Mirror
Applications of Plane Mirror
- Optical Testing
- Periscope mirror
- Kaleidoscope
- Anti-parallax mirror in galvanometer
Card 12: Application of Convex Mirror
Card 13: Application of Concave Mirror
Applications of Concave Mirror
- Dentist Mirror
- Make-up mirror
- Reflector in Torch Light
- Reflector in Projector
- Reflector in Telescope.
|
