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प्रश्न
The earth receives heat from the sun by ______.
पर्याय
radiation
white
conduction
blue
convection
bad conductor
good conductor
black
reflection
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उत्तर
The earth receives heat from the sun by radiation.
Explanation:
Radiation is the transfer of energy through electromagnetic waves, such as light and infrared radiation. These waves travel through the vacuum of space, without the need for a medium, and reach the Earth, where they are absorbed, warming the planet.
संबंधित प्रश्न
Look at Figure. Mark where the heat is being transferred by conduction, by convection and by radiation.
Write true or false for a given statement.
On touching a lump of ice, we feel cold because some heat passes from our body to the ice.
Write true or false for a given statement.
Medium is necessary for the transfer of heat by radiation.
Select the correct alternative
Heat in a liquid is transferred by
Select the correct alternative
In the process of convection, heat travel
Why is the freezing chest in a refrigerator fitted near its top?
______ of heat does not require a medium.
Why are the houses in Rajasthan painted white?
When ice changes into a liquid, it absorbs energy.
Take two similar transparent glass bottles having wide mouths. Put a few crystals of potassium permanganate or pour a few drops of ink in one bottle. Fill this bottle with hot water. Fill the other bottle with cold water. Cover the cold water bottle with a thick piece of paper such as a postcard. Press the postcard firmly with one hand and hold the bottle with the other hand. Invert the bottle and place it on top of the hot water bottle. Hold both the bottles firmly. Ask some other person to pull the postcard. Observe what happens. Explain.
