Advertisements
Advertisements
Question
The earth receives heat from the sun by ______.
Options
radiation
white
conduction
blue
convection
bad conductor
good conductor
black
reflection
Advertisements
Solution
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.
RELATED QUESTIONS
No medium is required for transfer of heat by the process of ______.
Look at Figure. Mark where the heat is being transferred by conduction, by convection and by radiation.

Stainless steel pans are usually provided with copper bottoms. The reason for this could be that ______.
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.
Liquids are heated by conduction and radiation.
Select the correct alternative
Heat in a liquid is transferred by
Why is the freezing chest in a refrigerator fitted near its top?
Explain briefly the process of heat transfer by radiation.
Match the items in column-I to the items in column-II
| Column-I | Column-II | ||
| 1. | Linear expansion | (a) | change in volume |
| 2. | Superficial expansion | (b) | hot body to cold body |
| 3. | Cubical expansion | (c) | 1.381 X 10-23 JK-1 |
| 4. | Cubical expansion | (d) | change in length |
| 5. | Boltzmann constant | (e) | change in area |
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.

