Light — Flashcards
ICSE · Class 6 · Physics
31 flashcards for Light (ICSE Class 6 Physics) to test yourself on key terms and facts. Sample: "What is light?" Part of the ICSE Class 6 Physics syllabus.
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What is light?
Answer
Light is a form of energy that enables us to see objects. It travels in straight lines and affects our eyes to produce the sensation of vision.
Name two natural sources of light.
Answer
Sun and stars are natural sources of light. The sun gives us most of the light during the day, while stars give faint light at night.
Give three examples of artificial sources of light.
Answer
Examples: Electric bulb, candle, torch. These are man-made sources used when natural light is not available.
Why is the Moon not a luminous body?
Answer
The Moon does not emit its own light. It reflects sunlight towards Earth, which makes it visible. So, it is a non-luminous body.
Define luminous body with an example.
Answer
A luminous body emits its own light. Example: Sun, candle, electric bulb.
What are transparent substances? Give two examples.
Answer
Transparent substances allow light to pass through them completely. We can see clearly through them. Examples: Glass, clean water.
What is a translucent substance? Give two examples.
Answer
Translucent substances allow only partial light to pass through. Objects seen through them appear blurry. Examples: Tracing paper, waxed paper.
What are opaque substances? Give two examples.
Answer
Opaque substances do not allow any light to pass through. We cannot see through them. Examples: Wooden block, metal sheet.
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