Wave Model Of Light

Question 1

Define frequency + what’s it measured in

Answer 1

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

Question 2

The shorter the wavelength the ____ the greater the frequency

Answer 2

The shorter the wavelength the greater the frequency
Wavelength up + frequency down
High freq= short wavelength
Low freq= large wavelength

Question 3

Medium

Answer 3

Matter that a wave travels through

Question 4

Transverse waves vs compression waves

Answer 4

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

Question 5

What is visible light

Answer 5

Wave that you can see

Question 6

What’s refraction

Answer 6

When light passes from one material to another while bending slightly

Question 7

Longer wave length of light =

Answer 7

Less bent than shorter wavelengths

Question 8

What are the colours in white light

Answer 8

Spectrum / rainbow

Question 9

Which colour has longest wave lengths

Answer 9

Red

= refracts/ bends less than violent

Question 10

Which colour have shortest wave length

Answer 10

Violet

=bend/ refracts more than all colours

Question 11

Define reflection

Answer 11

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

Question 12

What are the three additive primary colours

Answer 12

Red
Blue
green

Question 13

What happens when u mix all additive primary colours together

Answer 13

You get white light

Question 14

What’s blue and green

Answer 14

Cyan

Question 15

Green + red

Answer 15

Yellow

Question 16

Red + blue

Answer 16

Magenta

Question 17

What’s radiant energy

Answer 17

Energy that tracked by radiation

Question 18

Electromagnetic radiation

Answer 18

Transmission of energy in the form of waves that extend from longest radio waves the shortest gamma Rays

Question 19

Radio waves

Answer 19

Have LONGEST wavelength= lowest frequency

Ex. Tv broadcasting, radios

Question 20

Microwaves

Answer 20

Shorter than radio waves

Ex. Microwave ovens, telecommunications

Question 21

Radar

Answer 21

Shorter wavelength microwave

ex radar guns, weather forecast

Question 22

Infrared waves

Answer 22

Heat waves, warmer an object = more infrared waves it emits

Ex. Remote controls, cd rom drives

Question 23

Ultraviolet wave

Answer 23

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

Question 24

X rays

Answer 24

Much shorter wavelength than Uv
Ex use X-ray to view bones, in airport, dentist etc
Dangerous

Question 25

Gamma rays

Answer 25

Shortest wave length
Result from nuclear reactions, produced by hottest a regions of universe
Ex used in radiation therapy to kill cancer cells

Question 26

List all waves from shortest to longest wavelengths

Answer 26

Gamma ray
X-ray
Uv
Infrared
Microwave
Radio

Question 27

What’s a wave examples

Answer 27

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