Key Facts
What does transparent mean?
Light is able to pass through so that objects behind can be distinctly seen
The ray that hits the mirror before being reflected is called what?
The incident ray
When does refraction occur?
When light passes from one transparent material to another
What is the coloured part of the eye called?
The Iris
What are the colours of the rainbow called? (Not the colour names)
Spectrum
What are the two different types of waves?
Transverse and longitudinal
If the angle of incidence was 55 degrees, what would the angle of reflection be?
55 degrees
Why does refraction occur?
Light travels at different speeds in different materials
The sensor
When light is split, what colours in the spectrum are we able to see?
Red, Orange, Yellow, Green, Blue, Indigo, Violet
Light is an example of which type of wave?
The angles of incidence and reflection are measured from what line?
The normal line
When light enters a glass block, it bends toward which line?
The normal line
What part of the eye changes light energy into nerve impulses?
The retina
Why do objects appear to be different colours?
They absorb and reflect different parts of the spectrum
Which type of wave is able to travel through a vaccum?
Transverse
Why is metal better at reflecting light than glass?
Metal is opaque so the light will reflect off, the glass is transparent so light can just pass through it
Why do rainbows occur when it is raining?
The rain drops refract the sunlight
The pupil is similar to what part of a camera?
The aperture hole
White light is passed through a red filter. What colour light would we be able to see?
Red
What does the law of reflection state?
The angle of incidence = the angle of reflection
What is the difference between specular and diffuse reflection?
Specular reflection occurs when light hits a smooth surface
Diffuse reflection occurs when light hits a rough surface
Describe a converging lens
A converging lens is thicker in the middle and thinner at the ends
What colour light is made when you mix Red, Green, Blue, Yellow, Cyan and Magenta?
White light
Why does a black object appear to be black?
It does not reflect any colours, it absorbs them all