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Why do shadows appear on a screen but not in the air?
- a)Shadows are blocked by the air
- b)The light is scattered in the air
- c)Shadows need a surface to form
- d)The screen is not transparent
Correct answer is option 'C'. Can you explain this answer?
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Why do shadows appear on a screen but not in the air?a)Shadows are blo...
Shadows appear on a screen because shadows need a surface to be formed and visible. When light is obstructed by an opaque object, it creates a shadow that can be seen on a surface or screen where the light is blocked. In the air, shadows are not visible because there is no surface to capture and display them.
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Why do shadows appear on a screen but not in the air?a)Shadows are blo...
Understanding Shadows
Shadows are a fascinating phenomenon that occurs when an object blocks light. To understand why shadows appear on a screen but not in the air, it’s essential to consider the role of surfaces.
What is a Shadow?
- A shadow forms when an opaque object obstructs the path of light, creating an area of darkness behind it.
- Light travels in straight lines, and when it encounters an object, it cannot pass through if the object is opaque.
Why Shadows Require a Surface?
- Need for a Surface: Shadows need a solid surface to be visible. When light is blocked, the area behind the object becomes darker, but this darkness can only be seen on a surface.
- Air vs. Screen: The air is not a solid surface; it is transparent and allows light to pass through. Hence, when light travels through the air, it does not create a noticeable dark area; instead, the light continues to diffuse.
- Role of a Screen: A screen, being solid and flat, provides a surface where the blocked light can create a distinct shadow. When light hits the screen, it cannot pass through the area behind the object, leading to a visible shadow.
Summary
- Shadows appear on a screen because it is a solid surface that can display the absence of light.
- In contrast, air is transparent and does not provide a surface for shadows to manifest, which is why they are not visible in the air.
Understanding these concepts helps clarify why shadows behave differently in various environments!
Shadows are a fascinating phenomenon that occurs when an object blocks light. To understand why shadows appear on a screen but not in the air, it’s essential to consider the role of surfaces.
What is a Shadow?
- A shadow forms when an opaque object obstructs the path of light, creating an area of darkness behind it.
- Light travels in straight lines, and when it encounters an object, it cannot pass through if the object is opaque.
Why Shadows Require a Surface?
- Need for a Surface: Shadows need a solid surface to be visible. When light is blocked, the area behind the object becomes darker, but this darkness can only be seen on a surface.
- Air vs. Screen: The air is not a solid surface; it is transparent and allows light to pass through. Hence, when light travels through the air, it does not create a noticeable dark area; instead, the light continues to diffuse.
- Role of a Screen: A screen, being solid and flat, provides a surface where the blocked light can create a distinct shadow. When light hits the screen, it cannot pass through the area behind the object, leading to a visible shadow.
Summary
- Shadows appear on a screen because it is a solid surface that can display the absence of light.
- In contrast, air is transparent and does not provide a surface for shadows to manifest, which is why they are not visible in the air.
Understanding these concepts helps clarify why shadows behave differently in various environments!
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Why do shadows appear on a screen but not in the air?a)Shadows are blocked by the airb)The light is scattered in the airc)Shadows need a surface to formd)The screen is not transparentCorrect answer is option 'C'. Can you explain this answer?
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