Period 2 - Light Movie

Today, we watched a movie on light and how Harvard students underdatand what we are learning about right now. There was an idea:



Imagine you see yourself in a mirror. If you wanted to see your whole body in the mirror, would you walk backwards or forwards?



Just about everyone in the movie and in our class agreed you need to move back, which ended up being correct. Just like the movie pointed out, no one really thinks about a mirror, but instead uses one everyday.



Two students think that if they were in a totally dark room, objects lose their color when we look at them, but we can see their shapes. It is true that people don't really understand the circumstances because no one has really been in the situation where there was absolutely no light. As the room is still dark, they both think that after four or five minutes they will be able to see. However, after six minutes, they still can't see.



Main Points Of Video:



-To show that most people still think they can see in the dark. It is a common belief.

-To teach us how to work in a group and help us respect people's ideas.

-You need to test many ideas because you can never be sure until you test it.

-They already have their own ideas about what their discussing and they probably still think they have some supporting evidence.

-We have to be careful of bias. Biases are kind of leaning on one idea and not giving two ideas a main point. This is sometimes because of past assumptions.

-The assumptions in this experiment was that when people thought they had past experiences of complete darkness, when really, there was just a little bit of light to guide them.

-Always disprove hypthesis when testing.



*Lines that represent light are arrows and are straight lines.



Why do we see the apple in light?



Ideas:



-Colors of apples reflect off eyes.

-Light reflects off eyes.

-Eyes detect color.

-Our eyes detect shapes as well.


The above are the things we learned in class. This was important because we learned further information on what we have been learning about in this unit. We did the same experiment that the two seventh graders in the video did, so this movie was really relatable. It made everyone thoroughly understand this experiment and what occurs when we are in complete darkness.


For the past couple of days, we have used lasers as our light source and tested how they work in different circumstances. We use laser pointers like the one below to conduct our experiment:




Experiment <--- website.

Thanks for reading! Hope you learned a lot!


EC