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22 Cards in this Set
- Front
- Back
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What are the two kinds of waves that affect our lives every day? |
sound waves and light waves |
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How are light and sound waves similar? |
Both light and sound waves have crests, troughs, and wavelengths |
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How are waves measured? |
wavelengths |
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How do light waves travel? |
straight paths called rays |
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Do light waves need matter to travel? |
no |
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What four things can a light ray do when it hits an object? |
reflect, refract, transmit, absorb |
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How do we know we can see light waves? |
We see color |
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What color is the longest wave? |
red |
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What color is the shortest wave? |
violet |
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What colors make up the visible spectrum? |
red, orange, yellow, green, blue, indigo, violet |
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What can we use to see the different colors that make up white light? |
A prism because it refracts (bends) the white light so we can see all of the colors in the visible spectrum (rainbow) |
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WHat happens to white light when it passes through a glass prism? |
bends |
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What is the bending of light called? |
refraction |
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How does a rainbow occur? |
light passes through tiny water droplets, the droplets act like a prism |
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What happens when light is absorbed by an object? |
light is taken in by the object |
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What happens when light is reflected by an object? |
light rays bounce back from the surface of the object |
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The number of vibrations in a unit of time is... |
frequency |
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What is a convex lens? |
A lens that is thicker in the middle than at the edges. It refracts (bends) light rays toward each other |
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What is a concave lens? |
A lens that is thinner in the middle than at the edges. It refracts (bends) light rays away friom each other |
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What happens when light rays hit an opaque object? |
The light rays are blocked and you only see a shawdo. A book is an example of an opaque object |
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What happens when light rays hit a translucent object? |
Some light rays will pass through. An example of a translucent object is frosted glass. |
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What happens when light rays hit a transparent object? |
A transparent object lets almost all light pass through. A clear glass window is an example of a transparent object. |
