Advertisements
Advertisements
प्रश्न
The earth receives heat from the sun by ______.
विकल्प
radiation
white
conduction
blue
convection
bad conductor
good conductor
black
reflection
Advertisements
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
Write true or false for a given statement.
Liquids are heated by conduction and radiation.
Why is the freezing chest in a refrigerator fitted near its top?
Maximum heat is absorbed by a ______ coloured object.
Conduction of heat takes place through a ______ substance.
Why are the houses in Rajasthan painted white?
What are the modes of heat transfer?
Why are heaters fitted near the floor and air conditioners near the ceiling of a room?
When ice changes into a liquid, it absorbs energy.
Take a sheet of paper. Draw a spiral on it as shown in Figure. Cut out the paper along the line. Suspend the paper as shown in Figure above a lighted candle. Observe what happens. Think of an explanation.
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.
