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Changing Shadows

  • Science
  • Class 4
  • 3D model
  • English

Changing Shadows: a 3D model for Class 4 Science, covering a shadow forms on the side of an object away from the light, a low light makes a long shadow; a high light makes a short shadow, for a straight post on level ground, shadow length = post height / tan(light elevation), when the light moves round to the other side, the shadow turns to the other side, the object and its height do not change; only the light moves.

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Also called

shadows · shadow length · shadow direction · sun and shadow · long and short shadows · shadow of a pole · tree shadow

Topics

  • a shadow forms on the side of an object away from the light
  • a low light makes a long shadow; a high light makes a short shadow
  • for a straight post on level ground, shadow length = post height / tan(light elevation)
  • when the light moves round to the other side, the shadow turns to the other side
  • the object and its height do not change; only the light moves
  • measuring shadow lengths from the base of the object

About this model

A GLB file of about 401 KB, shown in Lably's 3D viewer and, on a phone, placed in your room with AR. Credit: Oak tree: Kenney (www.kenney.nl), Nature Kit, CC0. Sun: NASA Visualization Technology Applications and Development (VTAD), Sun 3D model, science.nasa.gov. Post, ground, ruler, shadows, rays and animation: Lably. | Mixed: CC0 1.0 (Kenney oak tree) + NASA media guidelines (Sun texture/mesh) + newly authored Lably geometry and animation

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