Physics Flashcards
(25 cards)
Prism
Transparent glass or plastic object with flat polished sides
Visible light spectrum
R O Y G B I V
Bioluminescence
Ability of a plant or animal to produce light
Ex. Nemo fish
Incandescence
Light produced by an object, such as metal, that is at very high temps tyre
Ex. Old inefficient lightbulbs
Fluorescence
Light emitted by some substances when they’re exposed to electromagnetic radiation
Ex. Kind of a more compact version of incandescent
Phosphorescence
Ability to store energy from a source of light and then emit it slowly over a long period
Ex. Glow in the dark
Chemiluminescence
Light produced from a chemical reaction without a rise in tempature
Ex. Glow stick
Triboluminescence
Light produced from friction
Ex. Rubbing diamonds
Electric discharge
When an electric current passes through the air or another gas
Ex. Lightning
Law of reflection
Angle of reflection=angle of incidence (which r on opposite sides of the normal)
Incident Ray and normal and reflected Ray all on same flat surface
Normal Incident Ray Angle of incidence (i) Reflected Ray Angle of reflection (r)
Line perpendicular to a surface such as a mirror
Light Ray travelling towards the mirror
Angle between incident Ray and normal
Light Ray that bounced off reflected surface
Angle between reflected Ray and normal
Plane mirror
LOST
A regular flat mirror that reflects exact images Behind Up right Same Virtual
Concave/Converging mirrors (uses)
Flashlight
Telescope
Cosmetic mirrors
Headlights
Convex/diverging mirrors (uses)
Security, side view mirror
Refraction
Medium
Dispersion
Bending of light rays as they pass from one medium to another
Material that light is passing through
Refreshing of white light in separate wavelengths
Concave lens
Convex lens
(Uses)
Glasses telescopes
Camera projectors magnifying glass reading glasses
Cornea
Transparent layer of tissue in the outer surface of the eye covering the iris and pupil, refracts light entering eye
Iris
Circular colour band of muscle in the eye that controls size of the pupil and the amount of light that enters the eye
Pupil
Transparent area in centre of the eye that allows light to pass into eye
Lens
Curved transparent object that is smooth and regular shapes so that when light strikes it the light refracts in a predictable and useful way
Retina
Inner lining at the back of the eye that acts as a projection screen for light rays entering eye
Optic nerve
Connects eye to brain
Far sighted
Able to see far but not clearly
Near sighted
Able to see far but not close things
