GCSE Physics (AQA)

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Reflection & Colour

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Waves Electromagnetic waves

Reflection & Colour

3:57 Colour and Visible Light
Spec 4.6.2.6
Previous Diffuse & Specular Reflection Next EM Waves & Surfaces
  • Opaque objects reflect certain wavelengths of visible light and absorb others.
  • An object is opaque if no visible light transmits through it.
  • Light can be reflected or absorbed by opaque objects.
  • Example: Orange fruit reflects orange light and absorbs blue light.
  • The wavelength of visible light determines its color.
  • The color of an object is determined by which wavelengths from white light are most strongly reflected.
  • White light is a combination of all wavelengths of visible light.
  • Surfaces reflect only the wavelengths of their color (e.g., red surface reflects red light).
  • Our eyes detect reflected light rays, and our brains determine the color of the surface based on these rays.
  • Surfaces can reflect multiple wavelengths at different intensities, resulting in different tones and shades.
  • White objects reflect all wavelengths of visible light equally.
  • Black objects absorb all wavelengths of visible light.
  • White surfaces reflect white light, and black surfaces absorb all light, leaving no color indication.
  • For exams, understand what determines the color of a surface, including special cases like white and black objects.

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