Paint light rather than object.
How are we able to see transparent objects? Refraction and how the light passes through it. The background behind is also distorted.
Surface - Optics. A boundary between two regions where light travels at different speed.
Velocity (Air) ~ 300,000,000 m/s
Velocity (Glass) ~ 200,000,000 m/s
Light travels about 1.5x slower in glass than in empty space.
The brightness of a reflected ray is dependent on the index of refraction difference across the surface.
If light travels at the same speed through two surfaces, they would appear invisible within one another.
Deviation angle of the transmitted ray is also dependent on the index of refraction difference across the surface.
Surface finish
- Smooth surfaces gives off reflections. Glossy. Specular reflection.
- Rough. Scattering. Diffused reflection.
- No non-glare glass. Degraded image.
A roughened black object cannot be as black as a glossy black object.
A shiny object has more contrast than a matte object.
Google strength of reflection chart. Dependence on incident angle. Grazing incident.
Silver looks bluer than gold because gold does not reflect blue.
As an object reaches 90 degrees in relation to your eye, the reflectivity increases.
Concrete appears darker under water because less light is being reflected.
Law of refraction. Light at angles of greater incidents deviates more.
Surfaces:
- Matte
- Reflective - Light is bounced back.
- Refractive - Light is bent.
No comments:
Post a Comment