Visible light & colour (Edexcel GCSE Physics): Flashcards
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Practise the cards
14 cards from this deck
What determines an object's colour
What determines an object's colour
How it absorbs, transmits & reflects light wavelengths
What is white light
What is white light
A mixture of all visible light colours
Define opaque objects
Define opaque objects
Objects that don't allow light to pass through them
What determines colour of opaque objects
What determines colour of opaque objects
The wavelengths of light that are reflected
What wavelengths do white objects reflect
What wavelengths do white objects reflect
All wavelengths of visible light
What wavelengths do black objects absorb
What wavelengths do black objects absorb
All wavelengths, reflecting none
What do transparent/translucent objects do with light
What do transparent/translucent objects do with light
Transmit it (let some light pass through)
Primary colours of light
Primary colours of light
Red, green, and blue
How are other colours formed
How are other colours formed
By mixing different combinations of primary colours
Why does a banana look yellow
Why does a banana look yellow
It reflects yellow light (or red & green combined)
What do colour filters do
What do colour filters do
Let through particular wavelengths, blocking the rest
What does a primary colour filter transmit
What does a primary colour filter transmit
Only that colour's wavelength; absorbs others
What passes through a blue filter lit by white light
What passes through a blue filter lit by white light
Only blue light
What wavelengths does a cyan filter let through
What wavelengths does a cyan filter let through
Blue and green light