Light

1. Light

2. Imagine you are sitting at a table with a red apple in front of you. Your friend closes the door and turns out the light. It is totally dark in the room. How would you see the apple in the dark? • You would not see the apple, regardless of how long you are in the room. • You would see the red apple after your eyes have had time to adjust to the dark. • You would see the apple after your eyes have had time to adjust to the dark, but you would not see the red color. • You would see only a faint outline of the apple after adjusting to the dark.

3. And the answer is… #1. You would not see the apple no matter how long you waited! You can only see two ways: • A source gives off light and shines directly into your eye b. Light from a source reflects off of an object and goes to your eye So without a source of light, you cannot see the apple

5. Parts of the eye 5.

8. Nearsightedness and Farsightedness can see object near can see objects far Focus is too short, corrected with a concave lens Focus is too long, corrected with convex lens