Reflection & Refraction

Thirteen-year-old Brian Robeson is on his way to visit his father when the single engine plane in which he is flying crashes. Suddenly, Brian finds himself alone in the Canadian wilderness with nothing but his clothing, a tattered windbreaker, and the hatchet his mother has given him as a present. Brian has no time for anger, self-pity, or despair -- it will take all his know-how and determination, and more courage than he knew he possessed, to survive. 2017 © Science Toolkit

He had spent several days making a bow and some arrows, only to have the bow splinter into pieces the first time he tried to use it. He made another bow from a different kind of wood, but still had no success catching fish. Finally, he figured out that he needed to adjust his aim slightly to compensate for the way light bends underwater. Once he figured this out, Brian was able to catch fish pretty easily. He caught at least twenty of them that first day, roasting them over the fire on a stick and eating until he was full. When he went to sleep that night, he was hopeful again, although it was not a hope of being rescued. Just a hope in his ability to take care of himself.  Chapter 13 Brian is standing at the edge of the lake watching the water. He stands stock still with his bow in his hand, but he's not looking for a fish. Turns out he is sick of fish. Instead, he's looking for one of the birds—he calls them foolbirds—that live on the edge of the lake.  Sensing something, he's stopped what he was doing, and he's just holding still, listening and looking.  This has happened to him before—somehow his senses told him that he needed to pay attention, that something had changed—and it turned out that the bear was nearby with her cubs. Brian turns slowly, and up on the bank he sees a wolf watching him. Yowza.  But Brian doesn't panic—oh no. He sees the wolf as part of the woods and part of everything else, and he nods to it. The wolf watches him a little longer, then walks off into the woods, followed by three other wolves.  How's that for a cool encounter? Brian has changed since the last time we've seen him. It's been forty-seven days since the crash, and forty-two days since he'd heard the plane go by overhead (at the end of the last chapter). After the plane had flown away, Brian gave in to hopelessness—he let the fire go out, didn't eat, even tried to kill himself by cutting his arm with the hatchet. He wasn't able to do it, though, and finally fell into a restless, troubled sleep.  When he woke up, dried blood on his arm from the cuts, he realized that he'd been changed by the experience of the plane flying overhead. "He was not the same and would never be again like he had been," the narrator tells us. "[H]e would not die, he would not let death in again" (13.17). So Brian started again, trying to learn and to survive—but he made a lot of mistakes. He had spent several days making a bow and some arrows, only to have the bow splinter into pieces the first time he tried to use it. He made another bow from a different kind of wood, but still had no success catching fish. Finally, he figured out that he needed to adjust his aim slightly to compensate for the way light bends underwater. (Check out an explanation of that cool physics phenomenon.)  Once he figured this out, Brian was able to catch fish pretty easily. He caught at least twenty of them that first day, roasting them over the fire on a stick and eating until he was full.  When he went to sleep that night, he was hopeful again, although it was not a hope of being rescued. Just a hope in his ability to take care of himself. 2017 © Science Toolkit

Observe each piece of the picture. What observe can you make? What do you think the picture represents? What questions do you have?

Observe each piece of the picture. I see ____________ I think ___________ I wonder _________

Observe each piece of the picture. I see ____________ I think ___________ I wonder _________

Observe each piece of the picture. I see ____________ I think ___________ I wonder _________

Light Rays Light travels in a straight line until it strikes an object or passes through a medium.

Reflection Bounce Smooth and Shiny Reflection

Reflection

Refraction Changes mediums and bends See through Lens Object appear different

Medium Solid: Glass Liquid: Water Gas: Air

Refraction

When light changes mediums and bends it’s refraction, When light changes mediums and bends, when light changes mediums and bends, when light changes mediums and bends it’s refraction.   When light bounces off an object it’s reflection, When light bounces off an object, when light bounces off an object , when light bounces off an object it’s reflection. Tune: She’ll be coming around the mountain 2017 © Science Toolkit