Changes

: A shadow can be caused by an [[Opacity|opaque]] object blocking the light from any light source like the sun[[The Sun]], or a light bulb. {| class="wikitable"|+ The length of this '''shadow''' depends on the position of the light source and object.|-|[[File:ShadowStick1.png|center|200px]]|[[File:ShadowStick2.png|center|200px]]|[[File:ShadowStick3.png|center|250px]]|-| style="height:20px; width:200px; text-align:center;" |When the light source is overhead the '''shadow''' is underneath the object.| style="height:20px; width:200px; text-align:center;" |When the light source gets lower the '''shadow''' gets longer.| style="height:20px; width:250px; text-align:center;" |The lower the light source, the longer the '''shadow'''.|} {| class="wikitable"|+ The size and shape of a '''shadow''' depends on the position of the light source and object.|-|[[File:ShadowCylinder1.png|center|300px]]|[[File:ShadowCylinder3.png|center|300px]]|[[File:ShadowCylinder2.png|center|300px]]|-| style="height:20px; width:200px; text-align:center;" |When the light source is far away the '''shadow''' is smaller.| style="height:20px; width:200px; text-align:center;" |When the light source is closer to the object the '''shadow''' is bigger.| style="height:20px; width:200px; text-align:center;" |If you move the object around you can get a different shaped '''shadow'''.|}

Only the sun [[The Sun]] can cause shadows: True or False? It is unclear where this misconception comes form but teachers should take special care to ensure students consider this question thoughtfully.