Lesson 10 Flashcards
Vision takes place when Faye’s of light from an object/objects are
Brought together in focus on the retina of the eye
When light travels, it behaves in two ways:
- Like a wave generate by dropping a rock into a pond
2. Like a particle or photon
As wavelength changes, so does the
Perceived color of light
Wavelengths of light visible to humans vary in length from
380 to 760 nm
What’s a luminous / primary source
One that generates light
What’s a secondary source
A source that reflects light from a primary source
A single ray of light travels in a straight line unless it
Bumps into a highly reflective object
What’s the angle of incidence (i)
Angle at which light strikes the surface
What’s the angle of reflection (r)
The angle at which a ray is reflected
What’s a rarer medium
A medium of less resistance
What’s a denser medium
A medium of more resistance
The refractive index is a number which
Represents the amount of resistance to the speed of light
What’s the equation for relative refractive index
Speed of light in air / speed of light in new substance
What’s the wave front
The outer border of the circle of light
For spectacle lenses, the more important focal point is
F’
