Light P4

Question 1

What is Light?

Answer 1

1. Light is a form of energy. It is non-matter
2. Light can be natural (most from the Sun) or manmade/artificial

Question 2

Properties of Light

Answer 2

1. Light travels in straight lines and does not bend around objects.
   *thus when you draw light rays always straight with one arrow
2. Light can be reflected, bouncing off objects into our eyes so we can see them.
   *when drawing: light rays must come from light source and bounce off object at roughly right angles before entering our eyes so we

Question 3

What is a Shadow and Why do Shadows Form?

Answer 3

Region of darkness formed when light is partially or completely blocked by an object. This happens because
1. Light travels in straight lines
2. Light cannot bend around the object

Question 4

What affects the Size of a Shadow?

Answer 4

1. Distance between Object and Light Source
   - When the object is closer to the light/distance decreases, the size of the shadow increases
   - Rmb that for most qns, you can move BOTH the objects and the light source
2. Distance between Object and Screen
   - When object is closer to the screen, the shadow size decreases
   - Usually you can move BOTH the object and screen