Sample
Summaries after sample
,Sample
Summaries after sample
, Law of refraction
The speed of light
• Light travelling from a less dense to a more dense
medium causes the light to bend towards the • Light travels at 300 000 km per second.
normal in that medium. • It takes sunlight 8 minutes to reach Earth.
• Light travelling from a more dense to less dense •
medium changes the direction away from normal.
•
•
How does your eye see light Colour of white light
when you look at objects? • Visible light is colourless but is made up of
different colours.
M10: Visible light
Sample
• Light enters through the cornea and goes • Colours of the rainbow (Roy G Biv) – red,
through the pupil to the retina. orange, yellow, green, blue, indigo, violet.
• The retina is made up of light-sensitive cells •
which form the optic nerve – converts light
into electrical impulses.
• The brain interprets the electrical impulses.
Summaries after sample Dispersion of white light
•
•
• Shining a beam of white light at a triangular
prism at an angle produces a coloured spectrum.
Law of reflection • The prism is denser than air – slows the light as it
passes through.
• Incident ray – the light ray striking the surface. •
• Reflected ray – ray leaving the surface. Opaque and transparent •
• Angles of incidence and reflection are
measured from the normal line. substances
• Law of reflection - the angle of the incidence • Opaque objects don’t let light pass through them – the
must equal the angle of reflection for light to light is absorbed/ reflected.
be reflected. • Transparent objects all light to pass through them –
• most of the light is transmitted.
• • Translucent objects – allow some light to pass through.
•
•
T3-M10 Spot On Copyright © www.summariessa.co.za (DO NOT COPY)
GR8
NS Mind Map
Summaries after sample
,Sample
Summaries after sample
, Law of refraction
The speed of light
• Light travelling from a less dense to a more dense
medium causes the light to bend towards the • Light travels at 300 000 km per second.
normal in that medium. • It takes sunlight 8 minutes to reach Earth.
• Light travelling from a more dense to less dense •
medium changes the direction away from normal.
•
•
How does your eye see light Colour of white light
when you look at objects? • Visible light is colourless but is made up of
different colours.
M10: Visible light
Sample
• Light enters through the cornea and goes • Colours of the rainbow (Roy G Biv) – red,
through the pupil to the retina. orange, yellow, green, blue, indigo, violet.
• The retina is made up of light-sensitive cells •
which form the optic nerve – converts light
into electrical impulses.
• The brain interprets the electrical impulses.
Summaries after sample Dispersion of white light
•
•
• Shining a beam of white light at a triangular
prism at an angle produces a coloured spectrum.
Law of reflection • The prism is denser than air – slows the light as it
passes through.
• Incident ray – the light ray striking the surface. •
• Reflected ray – ray leaving the surface. Opaque and transparent •
• Angles of incidence and reflection are
measured from the normal line. substances
• Law of reflection - the angle of the incidence • Opaque objects don’t let light pass through them – the
must equal the angle of reflection for light to light is absorbed/ reflected.
be reflected. • Transparent objects all light to pass through them –
• most of the light is transmitted.
• • Translucent objects – allow some light to pass through.
•
•
T3-M10 Spot On Copyright © www.summariessa.co.za (DO NOT COPY)
GR8
NS Mind Map
