Light

(Redirected from Visible Light)

Key Stage 2

Meaning

Light is what we can see with our eyes and dark is when there is not enough light to see things clearly.

Light can be very bright or it can be very dark.
Light travels in straight lines.
Light comes from luminous objects and is reflected off non-luminous objects. The Sun can be seen because it is luminous. The Moon can be seen because it reflects the light of The Sun.
When light is very bright it can hurt our eyes. Light from The Sun is very bright and we shouldn't look at The Sun because it can cause people to go blind.
When there is not enough light to see we say it is dark. At night time it is very dark which is why it is hard to see.
 No-one can see because there is no light so the room is dark. The man can see the light bulb because light from the bulb goes into the man's eyes. The boy cannot see the light bulb because his eyes are closed.

Key Stage 3

Meaning

Light is a wave that humans can see with their eyes.

Light is a transverse wave.
Light can travel through a vacuum as well as through any transparent solid, liquid, gas.
The speed of light through a vacuum is 300,000,000m/s.

As a wave light can be:

Medium

Light can travel through a transparent medium but it does not need matter to travel through as it can pass through a vacuum.
Light can travel through any transparent solid, liquid, gas.
Light travels most quickly through a vacuum.
Light travels most slowly through solids.

Colour

Light can be divided into 7 colours:

• Red
• Orange
• Yellow
• Green
• Blue
• Indigo
• Violet

Key Stage 4

Meaning

Visible light is an electromagnetic wave that humans can see.

Properties

Visible light is a transverse wave.
Visible light can travel through a vacuum as well as through any transparent solid, liquid, gas.
The speed of visible light through a vacuum is 300,000,000m/s.

As a wave light can be:

Colour
Different frequencies of visible light are reflected or absorbed by different surfaces giving them colour.

Visible light can be divided into 7 colours:

Applications

Visible light is used for sight, photography, microscopy, telescopy because it can be seen with the human eye.
Visible light can be used in fibre optic communication because it is not absorbed by the glass that the fibres are made from and it is reflected internally by the interface between the glass and the air.

Dangers

There are no dangers of visible light, unless it is extremely intense in which case it could cause blindness.

References

AQA

Light year, page 274, GCSE Physics; Student Book, Collins, AQA
Light, models of, page 336, GCSE Combined Science Trilogy 1, Hodder, AQA
Light, pages 124, 126-127, 131, 154-157, 176-177, GCSE Biology; Third Edition, Oxford University Press, AQA
Light, pages 192, 202-213, 238-239, GCSE Physics; Third Edition, Oxford University Press, AQA
Light; red-shift, page 256, GCSE Physics, Hodder, AQA
Light; reflection of, pages 188-90, 195, 197, GCSE Physics, Hodder, AQA
Light; refraction of, pages 195-6, 198, GCSE Physics, Hodder, AQA
Light; spectrum of, pages 207-8, GCSE Physics, Hodder, AQA
Light; transmission and absorption of, pages 189-90, GCSE Physics, Hodder, AQA
Light; uses and applications, page 200, GCSE Physics, Hodder, AQA
Visible light, pages 190-1, 226-7, 234, GCSE Physics; Student Book, Collins, AQA
Visible light, pages 192, 206-207, GCSE Physics; Third Edition, Oxford University Press, AQA
Visible light, pages 200, 207, GCSE Combined Science Trilogy; Physics, CGP, AQA
Visible light, pages 223, 225, GCSE Combined Science; The Revision Guide, CGP, AQA
Visible light, pages 242, 249, 253, 254, 261, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA
Visible light, pages 76, 85, GCSE Physics; The Revision Guide, CGP, AQA
Visible light; lenses, pages 266-276, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA
Visible light; reflection and refraction, pages 195-197, GCSE Combined Science Trilogy; Physics, CGP, AQA
Visible light; reflection and refraction, pages 232-238, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA
Visible light; refraction and reflection, pages 77, 80, GCSE Physics; The Revision Guide, CGP, AQA

Edexcel

Light, page 68, GCSE Physics, Pearson Edexcel
Light; angle of incidence, page 66, GCSE Physics, Pearson Edexcel
Light; angle of reflection, page 66, GCSE Physics, Pearson Edexcel
Light; filters, page 69, GCSE Physics, Pearson Edexcel
Light; ray diagrams, pages 66-67, GCSE Physics, Pearson Edexcel
Light; red shift, pages 124-125, GCSE Physics, Pearson Edexcel
Light; reflection, page 66, GCSE Physics, Pearson Edexcel
Light; refraction, page 66, GCSE Physics, Pearson Edexcel
Light; transmission, page 69, GCSE Physics, Pearson Edexcel
Light; visible spectrum, page 68, GCSE Physics, Pearson Edexcel
Light; white light, page 68, GCSE Physics, Pearson Edexcel
Visible light, pages 127, 137, GCSE Physics, CGP, Edexcel
Visible light, pages 168, 171, GCSE Combined Science; The Revision Guide, CGP, Edexcel
Visible light, pages 40, 43, 47, GCSE Physics; The Revision Guide, CGP, Edexcel
Visible light, pages 72, 78, 95, GCSE Physics, Pearson Edexcel
Visible light; colour, pages 137-139, GCSE Physics, CGP, Edexcel
Visible light; uses, page 134, GCSE Physics, CGP, Edexcel

OCR

Light, pages 189-192, 194, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR
Light, pages 61-63, 66, 68, 70-72, Gateway GCSE Physics; The Revision Guide, CGP, OCR
Light, plant responses to, pages 49, 51-53, 83, 110-111, Gateway GCSE Biology, Oxford, OCR
Light; reflection page 189, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR
Light; reflection, pages 61, 62, Gateway GCSE Physics; The Revision Guide, CGP, OCR
Light; refraction, pages 190, 191, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR
Light; refraction, pages 61, 63, Gateway GCSE Physics; The Revision Guide, CGP, OCR
Visible light, pages 152, 164-165, 264-265, Gateway GCSE Physics, Oxford, OCR
Visible light, pages 192, 194, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR