Practicing Success
Practicing Success
CUET Preparation Today
Which of the following phenomenon(s) may happen when we use an umbrella while going out in the sun? |
When heat falls on umbrella, a part of it is reflected. When heat falls on umbrella, a part of it is absorbed. When heat falls on umbrella, a part of it may be transmitted. All of these |
All of these |
The correct answer is option 4. All of these. All of these phenomena may happen when using an umbrella in the sun. Here's an explanation for each: 1. Reflection: When sunlight falls on the surface of the umbrella, a portion of it can be reflected back. This reflection helps in preventing some of the incoming heat from reaching the person underneath. 2. Absorption: Some of the heat from the sunlight can be absorbed by the material of the umbrella. This absorption can contribute to warming up the umbrella itself, but it also means that less heat is transmitted through the umbrella to the person below. 3. Transmission: Not all of the sunlight is reflected or absorbed by the umbrella; some of it may pass through the material, allowing a portion of the heat to reach the person underneath. However, the use of an umbrella can still significantly reduce the direct exposure to sunlight. So, all of these phenomena contribute to the umbrella's effectiveness in providing shade and reducing the amount of direct heat reaching the person. |
