Explanation: Rajasthan, a state in northwestern India, is renowned for its desert climate, particularly in the western part of the state. The region is characterized by extreme temperature variations between day and night, a phenomenon known as diurnal temperature variation. This variation is primarily due to the desert climate, which is influenced by several geographical and meteorological factors.
During the day, the sun's rays heat the dry, sandy soil and the air above it, causing temperatures to rise significantly. In the absence of cloud cover, which would otherwise reflect some of the sun's rays back into space, the heat is absorbed by the ground and the air, leading to high daytime temperatures. However, once the sun sets, the lack of cloud cover allows the heat to radiate back into the atmosphere, causing a rapid drop in temperature.
The average night temperature in Rajasthan typically ranges around 25 degrees Celsius. This temperature is a result of the desert's ability to cool down quickly after sunset. The dry air and the absence of moisture in the atmosphere also contribute to the rapid cooling, as water vapor in the air can retain heat and slow down the cooling process.
It is important to note that the temperature can vary depending on the specific location within Rajasthan. For instance, the Thar Desert, which covers a significant portion of the state, experiences more extreme temperature variations compared to the more eastern parts of Rajasthan, which are less arid.
Understanding the night temperature in Rajasthan is crucial for various reasons, including planning agricultural activities, managing energy consumption, and ensuring the comfort of residents and tourists. The significant drop in temperature at night is a characteristic feature of desert climates and is an essential aspect of Rajasthan's unique weather patterns.
In conclusion, the correct answer to the question about the night temperature in Rajasthan is 25 degrees Celsius, reflecting the typical cooling that occurs after sunset in the desert region. This temperature is a result of the rapid heat loss in the absence of cloud cover and the dry, sandy soil that does not retain heat well.