Light Sources
What is natural light?
Light sources that exist naturally in the environment
What does it mean to emit?
Objects that produce their own light
Is it safe to stare directly at the Sun? Why or why not?
No because it can damage your eyes
What is transparent? Give 2 examples
An object that ALL light passes through
Light travels in a straight line until it is blocked by an opaque object. The object creates a shadow.
What is artificial light?
Light that is created by humans. It is controlled and available when we need it.
What does it mean to reflect light?
Objects that do not produce their own light. They reflect light.
Name 4 ways to protect our eyes from the Sun
What is translucent?
An object that SOME light passes through
What happens when light shines through a prism?
The light separates and creates a rainbow!
A lightbulb is...
artificial light source
Does the Moon emit or reflect?
reflect
Can you stare at the Sun with sunglasses on?
NO! Sunglasses do not protect from staring at the Sun
What is opaque?
An object that NO light passes through. It is solid.
What are the colours of the rainbow?
Red, Orange, Yellow, Green, Blue, Indigo, Violet
The Sun is...
natural light source
Does a lamp emit or reflect?
emit
What 2 things can be used to look at the Sun?
Welders glass helmet or a pinhole camera
Give 3 examples of translucent objects
Wax paper, frosted window, parchment paper
How does light travel?
In a straight line
Fire is...
natural light source
Does a desk emit or reflect?
reflect
It is safe to stare at a solar eclipse?
NO! It can be damaging to your eyes
Give 2 examples of translucent objects
window, plastic wrap
What makes a good reflector?
It has to be smooth, shiny and flat (i.e. a mirror)