Tell me what im missing about so i can add in the information that you wanted:)

1. LIGHT

2. PROPERTIES OF
LIGHT
• Light travels in straight lines.
• It is a form of energy.
• It travels at a speed of 3 x 108 m s-1 in vacuum.
• When light hits an object, it can be reflected or refracted.

3. RAY AND BEAM OF
LIGHT
• A ray of light is indicated by a single straight line.
• A collective light rays is called a beam of light.

4. REFLECTION OF
LIGHT
• Reflection is light being bounced off after hitting an
opaque surface.
• Reflection allows us to see objects in our surroundings.
• In reflection of light, there are:
- Incident ray: Light ray coming towards the surface
- Reflected ray: Light ray bouncing off the surface

5. REFLECTION OF
LIGHT
• The type of reflection, regular or diffused is affected by the
type of surface.
- Regular reflection: When the light rays are incident on a
smooth surface, they are reflected on a regular manner.
- Diffused (or scattered) reflection: When the light rays are
incident on a rough surface, they are reflected in a
diffused or scattered manner.

6. THE LAWS OF
REFLECTION
• The 2 laws of reflection are:
- Angle of incidence is equal to angle of reflection.
- In a reflected diagram, the incident ray (i), the reflected ray
(r) and the normal must lie in the same plane.

7. PLANE MIRROR
Characteristics of an image formed in a plane mirror:
1. Laterally inverted
2. Same size as the object
3. Upright
4. Same distance of object and image from the mirror
5. Virtual (cannot be captured on screen)

8. REFRACTION
• Refraction is the bending of light rays when they travel
from one transparent medium to another.
• Refraction is caused by a change in the speed of light rays
when they travel in the media of different densities.
• Refraction of light can only take place in transparent
media such as air, water, vacuum(in space), glass and
diamond.
• Light travels at different speeds in different media.
- In a less dense medium, the speed of light is faster.
- In a denser medium, the speed of light is slower.

9. HOW LIGHT RAY
TRAVELS
• From a less dense medium to a denser medium:
- Light ray bend towards the normal.
• From a denser medium to a less dense medium:
- Light ray bends away from the normal

10. REFRACTIVE INDEX
• It is a measure of the bending of light ray when travelling
from one medium into another.
• Formula: n = sin i/ sin r

11. EFFECT OF REFRACTION
(APPARENT AND REAL DEPTH)
• Real depth is the actual depth or position of the object
under water.
• Apparent depth is the depth or position perceived by an
observer due to refraction of light.
• The apparent depth is less than the real depth in the effect
of refraction.