Question

The Stevenson’s screen is painted white to reflect _____.
A. sound
B. sun’s rays
C. light
D. none of these

Answer 1

Hint: The Stevenson’s screen is a shelter for meteorological instruments and forms part of a standard weather station. It holds instruments like Thermometers which are of two types: an ordinary one and a maximum/minimum one, a hygrometer, a barometer, a psychrometer, a dew cell, and a thermograph.

Complete answer: The Stevenson’s screen is a shelter for meteorological instruments and forms part of a standard weather station. It holds instruments like Thermometers which are of two types: an ordinary one and a maximum/minimum one, a hygrometer, a barometer, a psychrometer, a dew cell, and a thermograph. It provides a shelter against precipitation and direct heat radiation but allows air to pass through freely. It is used to provide a standardized environment eliminating other factors that may hinder the readings to measure temperature, humidity, dewpoint, and atmospheric pressure. It is painted white to reflect direct radiation.
- Option A: Painting it white won’t reflect the sound. Hence, this is an incorrect option.
- Option B: Painting it white will reflect the sun’s rays and it is done for that purpose only. Hence, this is the correct option.
- Option C: Painting it white will reflect the light but it is not done for this reason. Hence, this is an incorrect option.

Hence , The correct answer is Option B.

Note: It is a shelter for the instruments from the outside environment but allows air to pass freely inside it. It is used to provide a standardized environment eliminating other factors that may hinder the readings to measure temperature, humidity, dewpoint, and atmospheric pressure.