Visible light & colour (Edexcel GCSE Physics Combined Science): Flashcards
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Practise the cards
15 cards from this deck
What determines colour of materials?
What determines colour of materials?
How they absorb, transmit & reflect light wavelengths
What is white light?
What is white light?
Mixture of all visible light colours with different wavelengths
Define opaque objects
Define opaque objects
Objects that do not 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 does a red object reflect?
What wavelengths does a red object reflect?
Wavelengths corresponding to red part of spectrum
What wavelengths do white objects reflect?
What wavelengths do white objects reflect?
All wavelengths of visible light
What do black objects do with light?
What do black objects do with light?
Absorb all wavelengths, reflecting none
What do transparent/translucent objects do?
What do transparent/translucent objects do?
Transmit light (some light passes through them)
List the primary colours of light
List the primary colours of light
Red, green, and blue
How are other colours formed from light?
How are other colours formed from light?
By mixing different combinations of primary colours
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 blue filter with white light?
What passes through blue filter with white light?
Only blue light
How does an object appear through a different colour filter?
How does an object appear through a different colour filter?
Black (filter absorbs all reflected light)
What does a cyan filter transmit?
What does a cyan filter transmit?
Blue and green light