Term
| What is the only seen thing? |
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Definition
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Term
| What are 4 producers of light? |
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Definition
- Stars
- Flames
- Light bulb filaments
- GLowing gases
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Term
| Light is part of the_________________________. |
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Definition
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Term
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Definition
| Discovered that vibrating magnetic fields produce vibrating electric fields |
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Term
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Definition
| Discovered that vibrating electric fields produce vibrating magnetic fields |
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Term
| What is an electromagnetic field? |
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Definition
| Electric field + magnetic field |
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Term
| The electric fields and the magnetic fields are at ___________ to each other. |
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Definition
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Term
| How do you make an electromagnet? |
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Definition
- Take a nail
- Wrap a wire around it
- Attach battery to it
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Term
| What would happen if light slowed? |
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Definition
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Term
| Light cant speed up or slow down. Why? |
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Definition
| Law of Conservation of Energy |
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Term
| Who discovered the speed of light? |
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Definition
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Term
| What is the speed of light? |
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Definition
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Term
| Because all EM waves travel at the same speed, _______________________________________________. |
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Definition
| They travel at different frequencies |
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Term
| How are EM waves classified? |
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Definition
| EM spectrum classifies by frequencies |
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Term
| What percent of the EM spectrum is VL? |
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Definition
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Term
| What are the levels of EM waves, in the EM spectrum, in order from lowest frequencies to highest? |
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Definition
Lowest on top
- Radiowaves (G, AM, FM, TV)
- Microwaves
- Infrared Light
- Visible light (ROYGBIV)
- Ultraviolet light
- X rays
- Gamma rays
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Term
| What are the levels of VL from weakest to highest? |
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Definition
ROYGBIV
- Red
- Orange
- Yellow
- Green
- Blue
- Indigo
- Violet
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Term
| Wavelength is __________ propertional to frequency for EM waves. |
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Definition
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Term
| What units are used for EM wavelength? |
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Definition
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Term
| What is caused by light incountering matter? |
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Definition
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Term
| What happens if vibrations are extensive enough? |
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Definition
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Term
| What are opaque materials? |
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Definition
| Objects that absorb light and convert the energy to thermal energy at some frequencies and reflect the other frequencies |
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Term
| Absorbance/ reflectance depends on what? |
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Definition
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Term
| What are transparent materials? |
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Definition
| Objects that certain EM waves can pass through to the other side of the material and re-engage as an EM wave |
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Term
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Definition
| Regions where light doesnt reach, caused by opaque objects |
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Term
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Definition
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Term
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Definition
| Partial shadows where other light fills in the shadow |
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