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PVES Week 11
Light
| Question | Answer |
|---|---|
| Light is __________. | energy |
| Light can be identified as a small particle called a _______ and moves in a ______________. | photon straight line |
| Light has both ________ and __________ fields | electric magnetic |
| What is it when several different wavelengths of light travel together? | white light |
| What is the ability of light to cause change (such as heating an object)? | light energy |
| What is the change in the direction of waves as they bounce off a surface? | reflection |
| What is the bending of waves as they travel at an angle from object to another? | refraction |
| __________ determines the color of light? | wavelength |
| What is the band of light waves in the electromagnetic spectrum that vibrates at frequencies our eyes can detect? | visible spectrum |
| When light hits an opaque object it is either _________ or ________. | reflected absorbed |
| The color you see after light hits an object is the wavelength of light that has been _________. | reflected |
| Light waves _________ if they hit an uneven or smooth surface. | scatter |
| Light travels more slowly through water than air, so when looking at a pencil in a glass of water, it looks broken. As light passes from one material to another, it is __________. | refracted |
| A _____________ is a tool used to bend wavelengths of light at different angles so that we can see all the colors of light. | prism |
| What are the colors of the visible spectrum? | Red, Orange, Yellow, Green, Blue, Indigo, Violet (ROYGBIV) |
| Which color has the shortest wavelength and the MOST amount of energy? | violet |
| Which color has the longest wavelength and the LEAST amount of energy? | der |
| What optical tool is used to refract white light? | prism |
| Light travels from the sun to the Earth in less than ________. | 8 1/2 minutes |
| Refraction depends on what three things? | density of material wavelength of wave the angle wave enters objects |
| ___________ cause the sun to look flat. | refraction |
| A rainbow is an example of both __________ and ________; | refraction reflection |
| ___________ is the separation of light. | dispersion |
| __________ cause the dispersion (spreading out) of light, | Prisms |
| Light travels _________ than sound | faster |
| Light moves as _________ waves. | transverse |
| Light travels in a straight line called a __________. | ray |
| A group of parallel rays of light is a ________. | beam |
| The amount of energy in a light wave is related to its _______. | frequency |
| An object that lets no light pass through it is _______. | opaque |
| An object that allows SOME light to pass through it is _______. | translucent |
| An object that allows almost ALL light to pass through it is | transparent |
| A concrete wall or wood would be an example of a _________ object | opaque |
| A clear window or glass of water would be an example of a ________ object | transparent |
| A shower door or wax paper would be an example of a ________ object | translucent |
| Which type of light waves has the most energy? | gamma |
| Which type of light waves has the least energy? | radio |
| What color represents the total absence of reflected light? | black |
| What color represents the reflection of all visible light together? | white |
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pves
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