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Class 7 Science Chapter 11 Mindmap - Light: Shadows and Reflections
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FAQs on Class 7 Science Chapter 11 Mindmap - Light: Shadows and Reflections
| 1. What are shadows and how are they formed? |  |
Ans. Shadows are dark shapes that appear on a surface when an object blocks light. They are formed when light rays are obstructed by an opaque object, preventing the light from reaching the area behind the object.
| 2. What is the difference between a shadow and a reflection? | |
Ans. A shadow is a dark outline created by an object blocking light, whereas a reflection is an image that is seen in a mirror or shiny surface produced by light bouncing off that surface. Shadows occur on a surface opposite to the light source, while reflections occur on the surface of the reflective material.
| 3. How do the size and shape of shadows change throughout the day? | |
Ans. The size and shape of shadows change because the position of the sun in the sky changes throughout the day. In the morning and evening, shadows are longer and more elongated as the sun is lower in the sky. At noon, when the sun is directly overhead, shadows are shorter and more compact.
| 4. Can shadows be colored? If so, how? | |
Ans. Yes, shadows can appear colored under certain conditions. When colored light shines on an object, the shadow may take on a hue from the light source. Additionally, if the surface where the shadow falls has a color, it can also affect the appearance of the shadow.
| 5. Why do we see reflections in water and glass? | |
Ans. Reflections are visible in water and glass because these surfaces are smooth and can reflect light. When light rays hit these surfaces, they bounce back, creating an image of whatever is in front of them. The clarity of the reflection depends on how still the water is or how clear the glass is.
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