Vocabulary#5

1. Universe: everything that exists.
2. S:Stars are part of the universe.
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4. Telescope: adevice that collects light and makes distant objects look closer and larger.
5. S:There are two tipes of telescopes.
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7. Refraction: the bending of waves as theyy go from one substance to another.
8. S:Glasses use refraction.
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10. reflection:the bouncing of waves off a surface.
11. S:Mirros use reflection.
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13. wavelenght:the distance from one peak to next on a wave.
14. S:Wavelength is measured in meters.
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16. frequency:the number of waves that pass through a point in a second.
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18. electromagnetic spectrum: waves of light in orrder by wavelength.
19. S:Light frequencies is also  called the electromagnetic spectrum.