Light Flashcards
In a flat mirror, the angle of incidence is equal to …….
The angle of reflection
In a ray diagram, a normal is a line drawn at …….
90° to the mirror’s surface
Light travels …….
Fastest in a vacuum
We usually look at our reflection in a flat mirror. This type of mirror is a …….
a plane mirror
Light travels in …….
Straight lines
Light from the Sun is called ……
white light
When light travels from air to glass ….
It slows down
Light can be split into colours of the spectrum using a prism. This is called …….
dispersion
Grass looks green because …..
It reflects green light
The three primary light colours are …
Red, blue and green
Light that is dispersed by a prism is know as a
spectrum
Red has a wave length of
low frequency
Coloured filters only let
their colour through
light waves are
transverse waves
The speed of light in a vacuum is
300 million metres per second
The light from the sun gets to Earth in
8.3 minutes
A clear reflection from a mirror is known as
specular reflection
Rough surfaces look dull, light is scattered, this is known as
diffuse reflection
When light goes from a less dense medium to a more dense medium
light bends towards the normal
When light goes from a more dense medium to a less dense medium
light bends away from the normal
A convex lens bulges outwards
it causes rays of light to converge (move together)
