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LIGHT. SOL 5.3 By: Travis Humble, Langley Elementary. Light. Light does not need matter to travel. Light travels in waves called transverse waves.

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Presentation Transcript
light

LIGHT

SOL 5.3

By: Travis Humble, Langley Elementary

light1
Light
  • Light does not need matter to travel.
  • Light travels in waves called transverse waves.
  • Light travels very fast. It is the fastest thing in the universe, traveling at 186,282 miles per second or 670,616,629 miles per hour in a vacuum. Light travels a bit slower through matter.
light is fast
Light is FAST!!

Distance from Earth to the moon: 238,857 miles

Time it takes light to travel in between: 1.2 seconds

*The sun is 93 million miles from Earth and it only takes 8.3 minutes for the sun’s light to reach Earth*

**Distance between objects in space are so far that distance is measured in Light-Years, or, how far light travels in one year (1 Light-Year = about 6 trillion miles).

spectrum
Spectrum
  • White light is actually made of 7 colors. Red, orange, yellow, green, blue, indigo, and violet. Remember

ROY G BIV

R (ed)

O (range)

Y (ellow)

G (reen)

B (lue)

I (ndigo)

V (iolet)

slide7
To see the 7 colors of light as a spectrum, we need to bend, or refract, white light. This can be done with a prism.
color
Color
  • When light hits an object, some colors are absorbed and some colors are reflected.
  • We see the colors that are reflected.
color1
Color
  • Darker materials absorb more colors (and heat) than lighter materials.
  • Lighter materials reflect more colors (and heat) than darker materials.
  • White is the reflection of all colors.
  • Black is the absorption of all colors.