Light - Ray Model

Question 1

What is a ray

Answer 1

A form of energy that transfers from one aplce to teh other as an electromagnetic wave, it travels in a straight line called a ray

Question 2

What is a beam

Answer 2

a beam is a parallel ray made visible by teh scattering of light (eg torch and laser)

Question 3

What is a luminous object

Answer 3

emits its own light

Question 4

what is a non luminous object

Answer 4

made visible by refelction of light from a luminous source

Question 5

What is Incandescence

Answer 5

an object that produces light from burning (sun/candle)

Question 6

What is bioluminesence

Answer 6

light production from a living organism (glow worm)

Question 7

how does opaque material behave with light

Answer 7

all incident light is reflected or absorbed

Question 8

how does transparent material behave with light

Answer 8

parallel rays icnident on material are transmitted through it and emerge parallel to incident dierection

Question 9

how does translucent material behave with light

Answer 9

allows transmission of light rays put with some scattering that produces distorted images

Question 10

What happens when light touches a surface

Answer 10

1. transmission - light can go through the surface
2. reflection - light can bounce off teh surface
3. absorption - light goes into the surface and usually tranforms to heat energy

Question 11

What are the different point of a light wave

Answer 11

crest - highest point of wave
troph - lowest point of wave
wavelength - distance fromone crest to the next
amplitude - ammount of energy it carries and teh hight from middle line
frequency - hwo many waves are produced per second (hertz)