nature of light
Terms
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- What type of wave is light?
- electromagnetic
- electromagnetic waves are
- transverse waves
- radiation
- the emission of energy in the form of EM waves
- List wave types from high to low energy
- gamma, z-ray, ultra-violet, visible light, infra-red, microwaves, tv, radio
- What type of frequency and wavelength would be found on a high energy wave?
- high frequency, short wavelength
- modulation
- changing amplitude or frequency
- FM
- frequency modulation
- AM
- amplitude modulation
- radar
- detect speed and location of objects
- What are the colors of visible light?
- red, orange, yellow, green, blue, indigo, violet. (roy g. biv)
- what is white light?
- all colors of light blended together
- Law of Reflection
- the angle of incidence is equal to the angle of reflection
- regular reflection
- beams reflect off all points of the surface at the same angle
- diffuse reflection
- beams hit the surface and reflect at many angles
- absorption
- the transfer of energy carried by light waves to particles of matter
- scattering
- the release of light energy by particles of matter that have absorbed energy
- transmission
- the passing of light through matter
- translucent
- matter transmits and also scatters light as it passes through
- opaque
- matter that does not transmit any light
- primary colors
- red, blue, green
- secondary colors
- made from 2 primary colors
- pigment
- materials that absorb some wavelengths of light and reflects others
- mixing pigments
- color subtraction
- combining colors of light
- color addition
- primary pigments
- yellow, cyan, magenta
- what happens to light as it chages medium
- refraction
- how do raindrops act as prisms?
- they reflect and refract light inot colors
- lenses are used to ________ light
- refract
- a packet of light energy
- photon
- What color absorbs all wavelengths of light?
- black