Please enable JavaScript.
Coggle requires JavaScript to display documents.
p5 (hearing (sound waves reach eardrum so it vibrates, passed onto…
p5
hearing
-
passed onto ossicles, through semicircular canal and to the cochlea
-
brain interprets signals as sounds of different pitches and volumes, depends in frequency and intensity
high frequency, higher pitch
investigate reflection
draw solid line on paper and dotted line 90 degrees to solid line (normal)
place flat mirror to line up with solid line
use ray box to shine thin beam of white light at mirror so light hits the mirror where normal meets mirror
-
measure angle between incident and normal
measure angle between reflected ray and normal, always equal
refraction
-
if ray into denser material, slows and bends towards normal
if ray into less dense material, speeds up, bends away from normal
-
prisms
-
-
light bends away from the normal as it leaves the prism, different colours bend by different amounts
prisms shape spreads wavelengths, see a spectrum
sound
-
travels at different speeds in different media, faster in solids than in liquids, father in liquids than in gases
frequency doesn't change but wavelength does, longer when faster
-
ultrasound
can pass through body, partially reflected by different tissues
-
processed by a computer to produce an image of a foetus, or organs like kidneys
-
colour
opaque objects don't transmit light, absorb some wavelengths and reflect others
primary : red, blue, green
white reflects all, black absorbs all
-
-
filters
only certain colours transmitted, rest are absorbers
white through blue filter. only blue seen
blue through blue seen, still blue
red through blue, black seen
cyan lets through cyan, blue and gree
-