Physics (Reflection & Location image basics)

what are the different points of the “Ray Model of Light”

• it describes how light travels and he represent that travel

• it states that:

  Light travels in a straight line

  we use arrows to show the direction of the light

  A ray is drawn using a singular line

  A bean is drawn using multiple rays of light moving in the same direction

what can be described as a mirror?

a surface that is smooth and shiny which can reflect rays of light

What is another name for the flat mirror?

plane mirror

what is the angle of reflection equal to?

the angle of incidence

what is it called when light is reflected off a smooth surface and a rough surface?

smooth surface - regular reflection

rough surface - disuse reflection

Describe what happens in a regular reflection and in a diffuse reflection

regular reflection - parallel rays reflect parallel to each other off a smooth surface

diffuse reflection - parallel rays reflect at different angles at each other

what is an image in a mirror?

is a picture of the object created by the light

what does salt stand for?

S - size (reduced or magnified)

A - Altitude (Upright or Inverted)

L - Location (In front or Behind)

T - Type (Virtual or Real)

What type of image in seen in a plane mirror?

a virtual image (all the time)

what is the centre point of a converging mirror?

C - curvature

what’s the vertex point?

where the centre of the mirror meets a line from the centre of the curvature

what connects the V and C

PA - principal axis

What’s the focus point?

when incident rays that are parallel go through a converging mirror, the reflected rays converge (cross) at a point called the focus (F).

Where is the focus point located?

located halfway between the vertex and the center of the curvature

When does an image appear?

an image appears only when the reflected rays pass through the focal point

Rules for Locating Images in Converging Mirrors + draw image

1. When incident rays travel parallel to the principal axis, it is reflected through the focus (F)

2. When an incident ray travels through the focal point, it is reflected parallel to the principle axis

3. When an incident ray strikes the vertex (V), the principal axis is it’s normal

what is another name for convex mirrors?

Diverging mirror

Rules for Locating Image in Diverging mirrors + draw image

1. Incident rays that travel parallel to the principal axis are reflected as if they came from the focus

2. Incident rays that travel towards the focus point are reflected parallel to the principal axis

3. Incident rays that travel to the center of the curvature are reflected along the same path