Light travels in ________ lines.
Straight
When light bounces off something, it is called __________
reflection
When light bends, it is called _________
refraction
Something that lets light completely through it is __________
transparent
Something that lets some light completely through it is __________
translucent
Something that does not let light completely through it is __________
opaque
What type of light source is a street lamp?
artificial light source
What type of light source are the stars?
natural light source
What surface is the best for reflection?
smooth and flat surfaces
What surface will not give a good reflection?
bumpy surfaces
When we see an object as red, which colour is reflected?
red
When we see an object as white, which colour is reflected?
all the colours
When we see an object as black, which colour is reflected?
nothing, all the colours are absorbed
When an opaque object blocks light, it creates a _______
shadow
Reflection off a smooth surface is called ________
specular reflection
Reflection off a rough surface is called ________
diffused reflection
