Show:
Characteristics of Light
How We See Colour
Mirrors
Refraction
Lenses
100
What is light a form of?
Radiant energy
100
What are the 3 additive Primary Colours?
Blue, Red, Green
100
What is a point of incidence?
the spot where the incidence ray hits the reflecting surface
100
Light travels faster in ___ than in _____.
Light travels faster in ICE than in WATER.
100
finish the sentence; Lenses can be either....
concave or convex
200
What does luminous indicate?
the source produces its own light
200
What are the 3 additive Secondary Colours?
Cyan, Magenta and Yellow
200
What happens when an object is put infront of a plane mirror?
All of the light rays coming from the object strikes the mirror and reflects from it
200
Finish this sentence; when the angle of incidence of the light ray is small.......
the angle of refraction is also small
200
What are lenses
thick pieces of glass or plastic that has atleast one curved side
300
What is a common form of electric discharge bulbs?
the sodium vapour bulb
300
What is the colour of an object determined by?
the colours of light that are reflected the surface and colours that the object absorbes
300
What is a principal axis?
the straight line that passes through the centre of the curvature
300
What is refraction?
Process of slight deviation of the light ray from the original direction, while passing through one medium to another
300
concave lenses cause light rays to do what?
they cause them to move apart
400
What are the 4 forms of luminescence?
- Flourescence - Phosphorescence - Chemiluminescence - Bioluminescence
400
When an object absorbs a colour, what process occurs?
it removes the colour from the beam of light
400
What are the 4 key characteristics of an image?
-Size -Attitude -Location -Type
400
What heppens when light travels from something that is less dense to an object that is more dense?
The light slows down and bends towards the normal
400
Why is a flat piece of glass not considered a lense?
because lenses need atleast one curved side