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: In a dark room you cannot see any objects because there is no light to reflect off the objects.
: When you turn on a light bulb in a dark room the light travels from the light bulb to the objects in the room. The light then reflects off the objects and goes into your eyes. That is how we can see the objects.
{| class="wikitable"
|-
|[[File:LightDark.png|center|200px]]
|[[File:LightManBoy.png|center|200px]]
|-
| style="height:20px; width:200px; text-align:center;" |No-one can see because there is no [[light]].
| style="height:20px; width:200px; text-align:center;" |The man can see the light bulb because light from the bulb goes into the man's eyes. The boy cannot see the light bulb because his eyes are closed.
|-
|[[File:LightBulbBoyMan.png|center|200px]]
|[[File:LightBulbTableMan.png|center|200px]]
|-
| style="height:20px; width:200px; text-align:center;" |The man can see the boy because light from the bulb is '''reflected''' off the boy and goes into the man's eyes.
| style="height:20px; width:200px; text-align:center;" |The man can see the table because light from the bulb '''reflects''' off the table and goes into the man's eyes.
|}