Mirror Mirror
Let's review the previous lesson about why we are able to see objects:
Why could we not see the object in the box originally?
What did we need to do so that we could see the object in the box?
What was the best position for the torch to be in for us to be able to see the object clearly?
Hold up a torch and predict where the light from the torch will go when it's switched on. When pointed in a different direction where will the light go? How do you know where it will go?
Remember: light travels in a straight line from the source.
Let's sprinkle talcum powder in front of the torch. What do you observe?
You must keep a safe distance away from the talcum powder, so that you do not inhale any.
Why could we not see the object in the box originally?
What did we need to do so that we could see the object in the box?
What was the best position for the torch to be in for us to be able to see the object clearly?
Hold up a torch and predict where the light from the torch will go when it's switched on. When pointed in a different direction where will the light go? How do you know where it will go?
Remember: light travels in a straight line from the source.
Let's sprinkle talcum powder in front of the torch. What do you observe?
You must keep a safe distance away from the talcum powder, so that you do not inhale any.
The talcum powder particles get in the way of the light. You don't actually see the beam of light, you see the particles that are in the path of the light because the light reflects off the talcum powder particles into our eyes.
Now, shine the torch onto the floor. Draw a ray diagram using this program: DrawIsland to show the path of light from the torch to the floor and from the floor to their eye. You can save your drawing and then print for your portfolio.
For your safety we do not shine lights into someone's eyes. We do not look directly into a light.
A Challenge for you...how can you make light go around a pile of books? What could you use to make the light travel around the books?
Light reflected from a very shiny surface, like a mirror, can damage the eye. You are to view light reflecting from a dull surface or object.
Now use our Learning Path below to investigate further: The Learning Place
Investigate further on The Learning Place: here is your Learning Path to follow: L68098721
Remember to update our Word Wall if needed - last page in our Weebly.
Now, shine the torch onto the floor. Draw a ray diagram using this program: DrawIsland to show the path of light from the torch to the floor and from the floor to their eye. You can save your drawing and then print for your portfolio.
For your safety we do not shine lights into someone's eyes. We do not look directly into a light.
A Challenge for you...how can you make light go around a pile of books? What could you use to make the light travel around the books?
Light reflected from a very shiny surface, like a mirror, can damage the eye. You are to view light reflecting from a dull surface or object.
Now use our Learning Path below to investigate further: The Learning Place
Investigate further on The Learning Place: here is your Learning Path to follow: L68098721
Remember to update our Word Wall if needed - last page in our Weebly.