Units pages 65 to 71 in tables. Conversion factors page 45. Physical constants pages 46 & 47
Laws of reflection: I, r, and normal all in the same plane.
Angle of incidence = angle of reflection ( i = r)
Parallax = the apparent movement of an object due to the motion of an observer.
Real image = The actual intersection of rays of light. The image can be produced on a screen.
Virtual image = Apparent intersection of light. Image cannot be produced on a screen.
Refraction = The bending of rays of light as they pass from one medium to another.
Laws of refraction = I, r and normal all in the same plane.
Snell's law: n = sin i/sin r
Critical angle = The angle of incidence who's corresponding angle of refraction is 90 degrees.
Total internal reflection = When the incident angle exceeds the critical angle the ray of light does not pass out of the first medium but is reflected back into it. Application: Fibre optic cables.
If object is outside focus in concave mirror the image is real. Ergo, inside f = imaginary
The image is always virtual and diminished in a convex mirror.
If object is outside focus in convex lens the image is real. Ergo, inside f = virtual.
The image is always virtual and diminished in a concave lens.
The power of a lens is measured in m-1 (per metre)
The eye (labels): Lens, retina, iris, ciliary muscle, pupil, optic nerve.
Short sight = sees near objects, image focused short of retina. (Long sighted opposite obviously).
All formulae for light available pages 59 & 60 of tables.