Class 7 Exam > Class 7 Questions > A source of light isa)an object that can refl...
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A source of light is
- a)an object that can reflect light
- b)an object that can refract light
- c)an object that can absorb light
- d)an object that can give light
Correct answer is option 'D'. Can you explain this answer?
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A source of light isa)an object that can reflect lightb)an object that...
Introduction:
Light is a form of energy that enables us to see things around us. Without light, the world would be in complete darkness. Light can come from different sources, and in this question, we are asked to identify the source of light.
Explanation:
The correct answer is option 'D,' an object that can give light. Let's understand why.
Natural Sources of Light:
1. Sun: The sun is the primary source of light on earth. It emits light and heat that sustains life on our planet.
2. Stars: Other stars in the universe also emit light, and we can see them twinkling in the night sky.
3. Lightning: Lightning is another natural phenomenon that produces light.
Artificial Sources of Light:
1. Incandescent bulbs: Incandescent bulbs use a filament that heats up and emits light when an electric current passes through it.
2. Fluorescent lamps: Fluorescent lamps use gas and electricity to produce ultraviolet light, which then interacts with a phosphorescent coating to produce visible light.
3. LED lights: LED lights use a semiconductor material that emits light when an electric current passes through it.
Conclusion:
In conclusion, objects that can give light are the source of light. Natural sources of light like the sun, stars, and lightning, as well as artificial sources like incandescent bulbs, fluorescent lamps, and LED lights, are all examples of objects that can give light.
Light is a form of energy that enables us to see things around us. Without light, the world would be in complete darkness. Light can come from different sources, and in this question, we are asked to identify the source of light.
Explanation:
The correct answer is option 'D,' an object that can give light. Let's understand why.
Natural Sources of Light:
1. Sun: The sun is the primary source of light on earth. It emits light and heat that sustains life on our planet.
2. Stars: Other stars in the universe also emit light, and we can see them twinkling in the night sky.
3. Lightning: Lightning is another natural phenomenon that produces light.
Artificial Sources of Light:
1. Incandescent bulbs: Incandescent bulbs use a filament that heats up and emits light when an electric current passes through it.
2. Fluorescent lamps: Fluorescent lamps use gas and electricity to produce ultraviolet light, which then interacts with a phosphorescent coating to produce visible light.
3. LED lights: LED lights use a semiconductor material that emits light when an electric current passes through it.
Conclusion:
In conclusion, objects that can give light are the source of light. Natural sources of light like the sun, stars, and lightning, as well as artificial sources like incandescent bulbs, fluorescent lamps, and LED lights, are all examples of objects that can give light.
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A source of light isa)an object that can reflect lightb)an object that...
A source of light is any device serving as a source of illumination
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A source of light isa)an object that can reflect lightb)an object that can refract lightc)an object that can absorb lightd)an object that can give lightCorrect answer is option 'D'. Can you explain this answer?
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