Wave Model Of Light Flashcards
Define frequency + what’s it measured in
The frequency of a wave is the number of repetitive motion that occur in a given time
frequency is measured in hertz or cycles per second
The shorter the wavelength the ____ the greater the frequency
The shorter the wavelength the greater the frequency
Wavelength up + frequency down
High freq= short wavelength
Low freq= large wavelength
Medium
Matter that a wave travels through
Transverse waves vs compression waves
Transverse waves, medium move up and down to the direction wave travels. Ex. Light energy
Compression waves/ longitudinal waves, medium moves back and forth along the wave direction. Ex. Sound energy
What is visible light
Wave that you can see
What’s refraction
When light passes from one material to another while bending slightly
Longer wave length of light =
Less bent than shorter wavelengths
What are the colours in white light
Spectrum / rainbow
Which colour has longest wave lengths
Red
= refracts/ bends less than violent
Which colour have shortest wave length
Violet
=bend/ refracts more than all colours
Define reflection
When a light wave strike an object and bounces off
= why it’s possible to see colours, colour= colour being reflect off of w rest of colours being absorbed
What are the three additive primary colours
Red
Blue
green
What happens when u mix all additive primary colours together
You get white light
What’s blue and green
Cyan
Green + red
Yellow
Red + blue
Magenta
What’s radiant energy
Energy that tracked by radiation
Electromagnetic radiation
Transmission of energy in the form of waves that extend from longest radio waves the shortest gamma Rays
Radio waves
Have LONGEST wavelength= lowest frequency
Ex. Tv broadcasting, radios
Microwaves
Shorter than radio waves
Ex. Microwave ovens, telecommunications
Radar
Shorter wavelength microwave
ex radar guns, weather forecast
Infrared waves
Heat waves, warmer an object = more infrared waves it emits
Ex. Remote controls, cd rom drives
Ultraviolet wave
Energetic short waves. Can cause skin burn and skin cancer due to over production of vitamin D
Uv light can be used in crime scenes
X rays
Much shorter wavelength than Uv
Ex use X-ray to view bones, in airport, dentist etc
Dangerous
Gamma rays
Shortest wave length
Result from nuclear reactions, produced by hottest a regions of universe
Ex used in radiation therapy to kill cancer cells
List all waves from shortest to longest wavelengths
Gamma ray X-ray Uv Infrared Microwave Radio
What’s a wave examples
A disturbance or moment that transfers energy through matter or space, without any permanent displacement
Ex light travels through air without moving air
Ex light moves from bulb to eye
