Question
Explain, with the help of ray diagrams, why the shadow created by your hand on a wall grows larger when you move your hand toward the light source.
Answers
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When you move your hand closer to the light source, the light rays that are being blocked by your hand become more concentrated. This causes the shadow to become larger because more light is being blocked.
Ray diagrams can help to illustrate this concept. When your hand is far away from the light source, the light rays are spread out and only a few of them are blocked by your hand. This creates a small shadow on the wall.
When you move your hand closer to the light source, the light rays become more concentrated and more of them are blocked by your hand. This creates a larger shadow on the wall.
The ray diagrams below illustrate this concept. The first diagram shows the light rays when your hand is far away from the light source. The second diagram shows the light rays when your hand is closer to the light source.
[Ray Diagrams]
Ray diagrams can help to illustrate this concept. When your hand is far away from the light source, the light rays are spread out and only a few of them are blocked by your hand. This creates a small shadow on the wall.
When you move your hand closer to the light source, the light rays become more concentrated and more of them are blocked by your hand. This creates a larger shadow on the wall.
The ray diagrams below illustrate this concept. The first diagram shows the light rays when your hand is far away from the light source. The second diagram shows the light rays when your hand is closer to the light source.
[Ray Diagrams]