Reflection of light.

Specular and diffused reflection

Smooth or gloss surface. (Mirror,

glass or still body of water)

Rough or matt surface. (bricks,

wood, wall paint or skin)

Specular reflection

Diffused reflection

Specular reflection

Diffused reflection

Allows us to see everything

Allows us to see ourselves

How do we represent this is diagrams.

First of all, we do NOT consider the whole

building or object all at once.

It’s just far too complex.

We represent one light ray by drawing a single straight line

towards the object. Then represent what happens to that one ray at a

single point on the object

Block of Wood

Block of Wood

Block of Wood

Single light ray

Block of Wood

One point of interaction with

object.

Block of Wood

Block of Wood

All resulting rays begin at same point

Block of Wood

Diffused Reflection

Tin

ted W

ind

ow

Tin

ted W

ind

ow

Single light ray.

Tin

ted W

ind

ow

One point of interaction with

object.

Tin

ted W

ind

ow

Tin

ted W

ind

ow

The resulting ray begins at same point.

Tin

ted W

ind

ow

Specular Reflection

Single light ray.

One point of interaction with

object.

The resulting rays begin at the same point.

Specular and Diffused Reflection

Now it is your turn to draw some diffused and specular reflected rays