Reading in a _____ area will cause eye strain.
Dark
How do light travels?
straight line
What do you call the objects that produces their own light?
Light source
It is our main source of light?
Sun
Light made by humans are called_________.
Artificial
Firefly is an example of _________ light.
Natural
Jellyfish is an example of ______ object.
Luminous
Noodles is an example of ________ object.
Non-luminous
Fire is an example of ________ object.
Luminous
Objects that does not produce their own light is called?
Non-luminous object
Fireworks are example of ________ light.
Artificial