Topic 6 Visable Light Flashcards

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1
Q

What is visible light

A

The range of wavelengths we perceive as different colours

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2
Q

What does each colour have

A

It’s own range of wavelengths (and frequencies ) ranging from violets at 400nm to reds at 700nm

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3
Q

What are the only colours you can’t make by mixing primary colours

A

Red
Blue
Green

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4
Q

What happens when all the different colours are put together

A

It creates white light

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5
Q

What are objects

A

Objects that don’t transmit light
When visible light waves hit them they absorb some wavelengths of light and reflect others

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6
Q

What does the colour of an opaque object depend on

A

Which wave lengths of light are most strongly reflected and the colours not seen are absorbed

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7
Q

What happens for opaque objects that aren’t a primary colour

A

May be reflecting either wavelength of light corresponding to that colour or the wavelength of primary colours that can mix together to make that colour

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8
Q

What do white objects reflect

A

All the wavelength of visible light equally

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9
Q

What is a black objects do

A

Absorb all wavelength of visible light
your eyes see black as the lack of any visible light

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10
Q

What do transparent( see through) or translucent (partially see through) objects do

A

Transmit light e.g. not all the like that hits the surface of the object is absorbed or reflected some can pass through

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11
Q

What is a transparent or translucent objects colour

A

Related to the wavelength of light transmitted and reflected by it

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12
Q

What are colour filters used for

A

To filter out different wavelength of light so that only certain colours are transmitted the rest are absorbed

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13
Q

What is a primary colour filter

A

Only transmits the primary colours

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14
Q

What would happen if a blue filter was used on a red object

A

The object would appear black as all of the lights by the object would be absorbed by the filter

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15
Q

What do filters the answer primary colours do

A

Let through both the wavelength of light for that colour and the wavelength of the primary colours that can be added together to make that colour

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