Question

Solar radiation flux is usually measured with the help of one of the following instruments?

• A. Anemometer
• B. Pyranometer
• C. Sunshine recorder
• D. All of the above

Answer 1

The correct option is B

Pyranometer

Explanation for the correct option

Option (B) Pyranometer

1. Solar radiation flux is the measurement of solar energy in a particular area.
2. Pyranometer is a device that is used to measure solar radiation flux.
3. Over a fairly wide wavelength range, incoming radiation is almost totally absorbed by a horizontal blackened surface using the thermoelectric detection concept.
4. The most common types of pyranometers used for measuring global solar radiation are thermopiles and silicon photocells

Diagram

Explanation for the incorrect option

Option (A) Anemometer

1. Anemometer is used to measure the wind speed and wind direction.
2. The operating premise of an anemometer is that the air stream will cool a hot item since the cooling rate is governed by the airflow speed.
3. Within the airflow, a fine wire that has been electrically heated can be positioned.
4. When the flow of air rises, the wire cools.

Option (C) Sunshine recorder

1. Sunshine recorder is a device that records the amount of sunshine in a particular region at a particular time.
2. The outcomes include information about the weather and climate, as well as the temperature of a specific location.
3. This data is useful in meteorology, science, agriculture, tourism, and a variety of other sectors.

So, option (B) is correct.