physics Flashcards
what does specular reflections mean
reflections by smooth shiny surfaces ehich produce symetrical rays
what are diffused reflections
rough nonshiny surfaces which rays go in all directions
label parts of the human eye
iris, lens, pupil, cornea optic nerve, retina
what is the function of the lens
the lens focuses the light ray
what is the optic nerve
connect to the brain
what colours does the retina detect
red,green,blue
what is white light
White light is colorless that contains all the wavelengths of the visible spectrum
what is refraction
when waves change direction as they cross a boundary.
Waves are only refracted if the wave meets the boundary at an angle.
what is the law of reflection
the angle ray is reflected the same way the angle the light hits the mirror
what are the secondary colours
magenta,cyan and yellow
what is the pivot
the point which the object can rotate or turn
what does equilibrium mean
the state of being balanced where forces cancel each other out
how do you calculate speed
speed=distance/time
what does a horizontal line on a distance-time graph represent
the object is stationary
what does resultant mean
the overall force that acts on a object
