Luminous objects |
Non-Luminous objects |
Objects that can emit light energy by themselves. | Objects that cannot emit light energy by themselves. |
These objects can cause a sensation of light. | These objects do not cause the sensation of light. |
The luminous objects are visible as they emit light on their own. | The non-luminous objects are visible because of other luminous objects. |
The sun and candle are examples. | The moon and planets are examples. |