Two containers, one painted black and the other painted white, have been kept in sunlight for one hour in the afternoon. Choose the correct observation.
The black container becomes hotter than the white container.
When two containers, one painted black and the other white, are exposed to sunlight, the color of the container affects how much heat they absorb. This is due to the different properties of light absorption and reflection of different colors.
Explanation:
Black Surfaces: Black color absorbs all wavelengths of light and converts them into heat. This leads to an increase in temperature of the black container as it absorbs most of the solar radiation.
White Surfaces: A white surface, on the other hand, reflects most of the wavelengths of light, absorbing less energy, and thus it does not get as hot as a black surface under direct sunlight.
Given these properties:
- The black container will absorb more heat than the white container due to its high absorption rate of light.
- The white container reflects most of the light, keeping it cooler compared to the black container.
Therefore, when both containers are kept in the sunlight for an hour, the black container becomes hotter than the white container.
Similar Questions
A copper spoon is dipped in hot water. What happens to its other end?
- Generally, what is the process of heat transfer in liquids?
- Which of the following processes is primarily responsible for heat loss from a hot utensil?
A brass rod (thermal conductivity 109 J/s m K) has an area of cross section 0.04 m 2and length 20 cm. If the two end of the rod are maintained at a temperature difference of 200°C, the rate of heat flow through the rod is ________.
A black surface absorbs ________ as compared to a white surface, under identical conditions.
- Heat supplied to a system is measured in ______.
- The change of state from ice to water is accompanied by ______.
- _____ is a mode of heat transfer by actual motion of matter.
- _____ is the unit of thermal conductivity.
- A brick wall having a thickness of 24 cm has an inner surface temperature of \(25^{\circ}C\) and an outer surface temperature of \(5^{\circ}C\). The rate of heat loss through per square metre of the wall (thermal conductivity = \(0.15\ J/(s\cdot m \cdot K)\)) is:
Important Questions from Heat transfer
The process by which heat is transferred from the hotter end to the colder end of an object is known as ______.
If a liquid is heated in weightlessness the heat is transmitted through
An iron ball at 60°C is dropped in a mug containing water at 60°C. The heat will
The temperatures of two perfect black bodies A and B are 400 K and 200 K, respectively. If the surface area of A is twice that of B, the ratio of total power emitted by A to that by B is
The volume and temperature of a spherical cavity filled with black body radiation are V and 300 K, respectively. If it expands adiabatically to a volume 2V, its temperature will be closest to
