Visible Light - Prism will separate light into its components
- Composed of 7 hues (Roy G. Biv), known as its spectrum
- Red (~ 700 nm or 7000 Å)
- Orange
- Yellow
- Green
- Blue
- Indigo
- Violet (~ 400 nm or 4000 Å)
- Color determined by its frequency (or, equivalently, its wavelength)
Visible Spectrum Properties of Light: Diffraction - Diffraction is the bending of a wave as it passes through a hole or around an obstacle.
- If light consists of parallel rays, they would travel through a small pinhole and make a small, bright spot on a nearby screen.
- Effect cannot be explained by ray model of light.
- Actually observe a spot larger than the pinhole and varying in brightness.
- The pinhole somehow affects the light that passes through it.
- Diffraction is proportional to the ratio of wavelength to width of gap.
- The longer the wavelength and/or the smaller the gap, the greater the angle through which the wave is diffracted.
- What happens if two waves run into each other?
- Waves can interact and combine with each other, resulting in a composite form.
- Interference is the interaction of the two waves.
- Superposition is the method used to model the composite form of the resulting wave.
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