Light allows us to see the world.
Objects that produce light are called luminous e.g. the Sun, light bulb, candle, computer screen. We can see these directly.
We see all other objects because light bounces off – or reflects – off them (see diagram on the left)
Some important facts about light:
– It travels in straight lines
– If a material lets light through it is transparent
– If a materials blocks light it is called opaque
– If a material blocks some of the light but also lets some through it is called translucent
Watch the video below to find out more about transparent, translucent and opaque materials.
The PowerPoint below contains more information about how we see.
Too much light can damage your eyes NEVER look directly at a very bright object such as the Sun.
Follow these hyperlinks to learn more:-