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lesson 4.2
Term | Definition |
---|---|
radio wave | a low frequency, low energy electromagnetic wave that has a wavelength longer than about 30 cm |
infrared wave | a electromagnetic wave with a wavelength shorter than a microwave but longer than light |
ultraviolet wave | an electromagnetic wave with a wavelength slightly shorter wavelength and higher frequency than light |
transparent | a material that allows almost all of the light striking it to pass through, and through which objects can see clearly |
translucent | a material that allows most of the light that strikes it pass through, but through which objects appear blurry |
opaque | a material through which light does not pass |
intensity | the amount of energy that passes through a square meter of space in one second |