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science ch15
| Question | Answer |
|---|---|
| What are light waves also called? | electromagnetic waves |
| Light can be described as? | a stream of particles |
| what is modulation? | the process of varying or changing radio wave strength |
| what is a wavelength slightly longer than visible light? | infrared radiation |
| The colors from lowest to highest frequency | red orange yellow green blue indigo violet |
| What is visible radiation? | known as light |
| ultraviolet radiation is | has higher frequency than visible light |
| What are gamma rays? | highest and most penetrating |
| The wavelength of an electromagnetic wave is | inversely proportional to its velocity |
| In a vacuum, all electromagnetic waves have | the same velocity |
| All electromagnetic radiation in the optical portion of the electromagnetic spectrum | is visible |
| compared to radio waves, microwaves have | have shorter wavelengths, photons with more energy, and higher frequencies |
| compared to the photons of violet light, the photons of red light | have less energy |
| compared to gamma rays x rays have | longer wavelengths |
| compared to gamma rays radio waves have | photons with less energy |
| all objects emit | electromagnetic waves |
| infrared radiation has a wavelength slightly longer than | microwaves |
| ultraviolet radiation has a higher frequency than visible light | true |
| photons are tiny bundles of radiation that have no | mass |
| visible radiation is the only part of the electromagnetic spectrum you can | see |
| gamma rays are radio waves with the highest frequency and energy | false |
| says light will reflect back at the same angle it came in | law of reflection |
| the angle at which light rays meet the boundary between two mediums becomes small enough, the rays will be reflected as if the boundary were a mirror | total internal reflection |
| lens that bends light inward | converging lens |
| bends light outwards | diverging lens |
| wavelength decreases as frequency | increases |
| the electromagnetic wave that has the shortest wavelength | ultraviolet wave |
| the electromagnetic wave that has the highest frequency | gamma rays |
| seeing objects | visible light |
| treating cancer | gamma rays |
| making vitamin d | ultraviolet radiation |
| baby monitors | radio waves |
| airport security | x rays |
| list the electromagnetic spectrum from lowest to highest energy | radio waves, microwaves, infrared, optical, ultraviolet, x rays, gamma rays |
| a periodic disturbance in a solid liquid, or gas as energy is transmitted through a medium | wave |
| the bouncing back of a ray of light, sound, or heat when the ray hits a surface that it does not go through | reflection |
| a change in the direction of a wave when the wave finds an obstacle or an edge such as an opening | diffraction |
| the bending of a wavefront as the wavefront passes between two substances in which the speed of the wave differs | refraction |
| a unit or quantum of light | photon |
| an image that forms at a location from which light rays appear to come but do not actually come | virtual image |
| an image of an object formed by light rays that actually come together at a specific location | real image |
| a transparent object that refracts light waves such that they converge or diverge to create an image | lens |
| in optics the process of separating a wave such as (white light) of different frequencies into its indivdual component waves( the different colors) | dispersion |
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