6943554
Description
Mind Map by Rachel Girvan, updated more than 1 year ago
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Created by Rachel Girvan
about 8 years ago
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Light
- Reflection
- the image in a plane mirror is...
- virtual
- the same size as
the object
- laterally inverted
- the same distance behind
the mirror as the object is
in front of the mirror
- virtual
- the image in a plane mirror is...
- Refraction
- happens when a
beam of light passes
from one material
into another, due to
a change in its
speed
- a ray parallel
to the normal
does not
refract
- light bends towards the normal when it slows
down and away from the normal when it
speeds up (TAGAGA/TAWAWA/TAPAPA)
- happens when a
beam of light passes
from one material
into another, due to
a change in its
speed
- Dispersion
- Different colours (or
frequencies) of light
travel at different speeds
in glass
- when light is passes
through a prism (a
triangular glass
block), a spectrum is
produced
- violet light is slowest, red light is
fastest
- when light is passes
through a prism (a
triangular glass
block), a spectrum is
produced
- Different colours (or
frequencies) of light
travel at different speeds
in glass
- Total Internal
Reflection
- In any glass block, some light is internally
reflected
- when the emerging ray on the other
side comes out along the surface,
most of the light is internally reflected
- the angle where the
emerging ray lies along the
surface is called the critical
angle
- after this all light
is internally
reflected
- after this all light
is internally
reflected
- the angle where the
emerging ray lies along the
surface is called the critical
angle
- when the emerging ray on the other
side comes out along the surface,
most of the light is internally reflected
- In any glass block, some light is internally
reflected
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